General Studies: Chemistry Misc Mock Test – Free Online Practice

General Studies: Chemistry Misc ke liye free mock test: 201 questions, timer, negative marking aur explanation ke saath. Koi login nahi, koi payment nahi — turant shuru karein.

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Practice Questions (30 of 201)

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1. Which type of bond is formed by the 'Complete Transfer' of electrons from one atom to another?
   एक परमाणु से दूसरे परमाणु में इलेक्ट्रॉनों के 'पूर्ण स्थानांतरण' से किस प्रकार का बंध बनता है?
   (A) Covalent Bond

   (B) Ionic (Electrovalent) Bond

   (C) Coordinate Bond

   (D) Hydrogen Bond
   ✅ Answer & Explanation

   Sahi jawab: B) Ionic (Electrovalent) Bond

   Explanation: Ionic bonds usually form between a metal (donor) and a non-metal (acceptor), like in NaCl.
2. A bond formed by the 'Sharing' of electrons between two atoms is called:
   दो परमाणुओं के बीच इलेक्ट्रॉनों के 'साझेदारी' से बनने वाले बंध को क्या कहा जाता है?
   (A) Ionic Bond

   (B) Covalent Bond

   (C) Metallic Bond

   (D) Hydrogen Bond
   ✅ Answer & Explanation

   Sahi jawab: B) Covalent Bond

   Explanation: Covalent bonds form when atoms share electron pairs to achieve a stable octet, like in $H_2O$.
3. Which of the following molecules contains a 'Triple Bond'?
   निम्नलिखित में से किस अणु में 'त्रि-बंध' (Triple Bond) उपस्थित होता है?
   (A) Oxygen ($O_2$)

   (B) Nitrogen ($N_2$)

   (C) Methane ($CH_4$)

   (D) Water ($H_2O$)
   ✅ Answer & Explanation

   Sahi jawab: B) Nitrogen ($N_2$)

   Explanation: Nitrogen atoms share three pairs of electrons ($N \equiv N$) to remain highly stable.
4. The bond present in 'Common Salt' (NaCl) is:
   'साधारण नमक' (NaCl) में कौन सा बंध उपस्थित होता है?
   (A) Covalent

   (B) Ionic

   (C) Coordinate

   (D) Hydrogen
   ✅ Answer & Explanation

   Sahi jawab: B) Ionic

   Explanation: Sodium loses an electron and Chlorine gains it, creating a strong electrostatic force.
5. What is the 'Shape' of a Methane ($CH_4$) molecule?
   मीथेन ($CH_4$) अणु की 'आकृति' कैसी होती है?
   (A) Linear

   (B) Trigonal Planar

   (C) Tetrahedral

   (D) Pyramidal
   ✅ Answer & Explanation

   Sahi jawab: C) Tetrahedral

   Explanation: Methane has $sp^3$ hybridization, resulting in a tetrahedral geometry with bond angles of 109.5°.
6. Which type of bond is responsible for the 'High Boiling Point' of water?
   जल के 'उच्च क्वथनांक' के लिए किस प्रकार का बंध उत्तरदायी होता है?
   (A) Ionic Bond

   (B) Covalent Bond

   (C) Hydrogen Bond

   (D) Metallic Bond
   ✅ Answer & Explanation

   Sahi jawab: C) Hydrogen Bond

   Explanation: Hydrogen bonding is a strong intermolecular force between the H of one molecule and O of another.
7. An 'Octet Rule' suggests that atoms are most stable when they have how many electrons in their outer shell?
   'अष्टक नियम' के अनुसार परमाणु तब सबसे स्थिर होते हैं जब उनके बाहरी कोश में कितने इलेक्ट्रॉन होते हैं?
   (A) 2

   (B) 4

   (C) 8

   (D) 18
   ✅ Answer & Explanation

   Sahi jawab: C) 8

   Explanation: Atoms lose, gain, or share electrons to attain the electron configuration of a noble gas.
8. Which of the following is an example of a 'Polar Covalent' molecule?
   निम्नलिखित में से कौन सा 'ध्रुवीय सहसंयोजक' अणु का उदाहरण है?
   (A) $H_2$

   (B) $O_2$

   (C) $HCl$

   (D) $Cl_2$
   ✅ Answer & Explanation

   Sahi jawab: C) $HCl$

   Explanation: Because Chlorine is more electronegative than Hydrogen, the shared electrons are pulled closer to Cl.
9. The 'Geometry' of a Water ($H_2O$) molecule is:
   जल ($H_2O$) अणु की 'ज्यामिति' कैसी होती है?
   (A) Linear

   (B) Bent (V-shaped)

   (C) Tetrahedral

   (D) Square Planar
   ✅ Answer & Explanation

   Sahi jawab: B) Bent (V-shaped)

   Explanation: Due to the presence of two lone pairs on Oxygen, the tetrahedral shape is distorted into a bent shape.
10. What is 'Hybridization'?
    'संकरण' (Hybridization) क्या है?
    (A) Mixing of atoms

    (B) Mixing of atomic orbitals to form new equivalent orbitals

    (C) Breaking of bonds

    (D) Transfer of protons
    ✅ Answer & Explanation

    Sahi jawab: B) Mixing of atomic orbitals to form new equivalent orbitals

    Explanation: Hybridization explains the equivalent bond lengths and shapes in molecules like $CH_4$.
11. Which of the following compounds has the 'Highest' melting point?
    निम्नलिखित में से किस यौगिक का गलनांक 'उच्चतम' होता है?
    (A) $CH_4$

    (B) $H_2O$

    (C) $NaCl$

    (D) $CO_2$
    ✅ Answer & Explanation

    Sahi jawab: C) $NaCl$

    Explanation: Ionic compounds like NaCl have very high melting points due to strong electrostatic lattice energy.
12. In a 'Coordinate Covalent Bond', the shared pair of electrons is provided by:
    'उपसहसंयोजक बंध' में इलेक्ट्रॉनों का साझा युग्म किसके द्वारा प्रदान किया जाता है?
    (A) Both atoms

    (B) Only one atom

    (C) Three atoms

    (D) The nucleus
    ✅ Answer & Explanation

    Sahi jawab: B) Only one atom

    Explanation: Also called a 'Dative Bond', as seen in the formation of Ammonium ion ($NH_4^+$).
13. Which force is the 'Weakest' among the following?
    निम्नलिखित में से कौन सा बल सबसे 'कमजोर' है?
    (A) Ionic Bond

    (B) Covalent Bond

    (C) Hydrogen Bond

    (D) Van der Waals Forces
    ✅ Answer & Explanation

    Sahi jawab: D) Van der Waals Forces

    Explanation: Van der Waals forces are weak intermolecular attractions between non-polar molecules.
14. The 'Bond Angle' in a linear molecule like $CO_2$ is:
    $CO_2$ जैसे रेखीय अणु में 'बंध कोण' कितना होता है?
    (A) 90°

    (B) 104.5°

    (C) 120°

    (D) 180°
    ✅ Answer & Explanation

    Sahi jawab: D) 180°

    Explanation: $CO_2$ has $sp$ hybridization, leading to a perfectly straight linear geometry.
15. Which molecule has 'Zero' dipole moment?
    किस अणु का द्विध्रुव आघूर्ण 'शून्य' होता है?
    (A) $H_2O$

    (B) $NH_3$

    (C) $CO_2$

    (D) $HCl$
    ✅ Answer & Explanation

    Sahi jawab: C) $CO_2$

    Explanation: In $CO_2$, the bond dipoles are equal and opposite, canceling each other out.
16. Metallic bonds are characterized by a 'Sea of':
    धात्विक बंध को किसके 'समुद्र' (Sea) द्वारा वर्णित किया जाता है?
    (A) Protons

    (B) Neutrons

    (C) Mobile Electrons

    (D) Fixed Ions
    ✅ Answer & Explanation

    Sahi jawab: C) Mobile Electrons

    Explanation: Delocalized electrons allow metals to conduct electricity and heat efficiently.
17. What is the hybridization of Beryllium in $BeCl_2$?
    $BeCl_2$ में बेरिलियम का संकरण क्या होता है?
    (A) sp

    (B) sp2

    (C) sp3

    (D) dsp2
    ✅ Answer & Explanation

    Sahi jawab: A) sp

    Explanation: Beryllium forms two sigma bonds with Chlorine, resulting in linear $sp$ hybridization.
18. Which molecule contains both 'Ionic and Covalent' bonds?
    किस अणु में 'आयनिक और सहसंयोजक' दोनों बंध उपस्थित होते हैं?
    (A) CH4

    (B) NaCl

    (C) KCN

    (D) H2O
    ✅ Answer & Explanation

    Sahi jawab: C) KCN

    Explanation: In Potassium Cyanide, the bond between K+ and CN- is ionic, while the bond between C and N is covalent.
19. What is the 'Bond Order' of an Oxygen ($O_2$) molecule?
    ऑक्सीजन ($O_2$) अणु का 'बंध क्रम' (Bond Order) क्या होता है?
    (A) 1

    (B) 2

    (C) 3

    (D) 1.5
    ✅ Answer & Explanation

    Sahi jawab: B) 2

    Explanation: Oxygen has a double bond between the two atoms, resulting in a bond order of 2.
20. The 'VSEPR Theory' is used to predict the:
    'VSEPR सिद्धांत' का उपयोग किसका अनुमान लगाने के लिए किया जाता है?
    (A) Atomic mass

    (B) Molecular geometry/shape

    (C) Electron affinity

    (D) Nuclear stability
    ✅ Answer & Explanation

    Sahi jawab: B) Molecular geometry/shape

    Explanation: Valence Shell Electron Pair Repulsion theory predicts shape based on the repulsion between electron pairs.
21. The 'Octet Rule' is violated in which of the following molecules?
    निम्नलिखित में से किस अणु में 'अष्टक नियम' का उल्लंघन होता है?
    (A) CO2

    (B) PCl5

    (C) NH3

    (D) CH4
    ✅ Answer & Explanation

    Sahi jawab: B) PCl5

    Explanation: In $PCl_5$, Phosphorus has 10 electrons in its valence shell, showing an 'expanded octet'.
22. Which 'Bond' is the strongest among the following?
    निम्नलिखित में से कौन सा 'बंध' सबसे मजबूत होता है?
    (A) Single Bond

    (B) Double Bond

    (C) Triple Bond

    (D) Hydrogen Bond
    ✅ Answer & Explanation

    Sahi jawab: C) Triple Bond

    Explanation: A triple bond (like in $N_2$) has the highest bond dissociation energy due to three shared pairs.
23. The 'Paramagnetic' nature of Oxygen ($O_2$) is best explained by:
    ऑक्सीजन ($O_2$) की 'अनुचुंबकीय' प्रकृति की सबसे अच्छी व्याख्या किसके द्वारा की जाती है?
    (A) Valence Bond Theory

    (B) Molecular Orbital Theory

    (C) VSEPR Theory

    (D) Lewis Theory
    ✅ Answer & Explanation

    Sahi jawab: B) Molecular Orbital Theory

    Explanation: Molecular Orbital Theory shows two unpaired electrons in antibonding orbitals of $O_2$.
24. What is the hybridization of 'Graphite'?
    'ग्रेफाइट' में कार्बन का संकरण क्या होता है?
    (A) sp

    (B) sp2

    (C) sp3

    (D) dsp2
    ✅ Answer & Explanation

    Sahi jawab: B) sp2

    Explanation: In graphite, each carbon is bonded to three others in a hexagonal layer, giving it $sp^2$ hybridization.
25. What is the 'Geometry' of a molecule with 3 bond pairs and 1 lone pair (e.g., $NH_3$)?
    3 बंध युग्म और 1 एकाकी युग्म वाले अणु (उदा. $NH_3$) की 'ज्यामिति' कैसी होती है?
    (A) Tetrahedral

    (B) Trigonal Planar

    (C) Trigonal Pyramidal

    (D) Bent
    ✅ Answer & Explanation

    Sahi jawab: C) Trigonal Pyramidal

    Explanation: Ammonia has a pyramidal shape because the lone pair repels the bond pairs more strongly.
26. Which 'Bond' is formed between atoms of significantly different electronegativities?
    काफी भिन्न विद्युतऋणात्मकता वाले परमाणुओं के बीच कौन सा बंध बनता है?
    (A) Non-polar Covalent

    (B) Polar Covalent

    (C) Coordinate

    (D) Metallic
    ✅ Answer & Explanation

    Sahi jawab: B) Polar Covalent

    Explanation: A difference in electronegativity causes partial charges ($\delta+$ and $\delta-$), making the bond polar.
27. What is the 'Bond Angle' in a molecule with $sp^2$ hybridization (e.g., $BF_3$)?
    $sp^2$ संकरण वाले अणु (उदा. $BF_3$) में 'बंध कोण' कितना होता है?
    (A) 180°

    (B) 109.5°

    (C) 120°

    (D) 90°
    ✅ Answer & Explanation

    Sahi jawab: C) 120°

    Explanation: Trigonal planar molecules have a bond angle of 120°.
28. Which molecule has 'Zero' net dipole moment despite having polar bonds?
    ध्रुवीय बंध होने के बावजूद किस अणु का शुद्ध द्विध्रुव आघूर्ण 'शून्य' होता है?
    (A) $H_2O$

    (B) $NH_3$

    (C) $CCl_4$

    (D) $HCl$
    ✅ Answer & Explanation

    Sahi jawab: C) $CCl_4$

    Explanation: In $CCl_4$ (Carbon Tetrachloride), the individual C-Cl bond dipoles cancel out due to perfect symmetry.
29. Which type of 'Interaction' holds the two strands of DNA together?
    डीएनए की दोनों श्रृंखलाओं को आपस में किस प्रकार का बंध थामे रखता है?
    (A) Covalent Bond

    (B) Ionic Bond

    (C) Hydrogen Bond

    (D) Metallic Bond
    ✅ Answer & Explanation

    Sahi jawab: C) Hydrogen Bond

    Explanation: Hydrogen bonds between Nitrogenous bases (A=T, G$\equiv$C) stabilize the double helix.
30. Which 'Bond' is the shortest and strongest?
    निम्नलिखित में से कौन सा कार्बन बंध सबसे छोटा और सबसे मजबूत होता है?
    (A) C-C (Single)

    (B) C=C (Double)

    (C) C$\equiv$C (Triple)

    (D) They are all equal
    ✅ Answer & Explanation

    Sahi jawab: C) C$\equiv$C (Triple)

    Explanation: As the number of shared electron pairs increases, the bond length decreases and strength increases.

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