Chemistry

Triple point of water is

Options

(a) 273 K (b) 373 K (c) 203 K (d) 193 K

Correct Answer:

273 K

Explanation:

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Hydrogen burns in air with a

Options

(a) light bluish flame (b) yellow flame (c) green flame (d) none of these

Correct Answer:

light bluish flame

Explanation:

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The maximum number of hydrogen bonds formed by a water molecule in ice is

Options

(a) 4 (b) 1 (c) 2 (d) 3

Correct Answer:

4

Explanation:

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What is the value of carbonate hardness of water sample if 100 mL of it took 5 mL of 0.09 N HCl solution ? (Molecular weight of Na₂CO₃ = 106)

Options

(a) 4.50 […]

Bond angle in H₂O₂ is

Options

(a) 97⁰ (b) 91⁰ (c) 94.8⁰ (d) 99.8⁰

Correct Answer:

97⁰

Explanation:

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Heavy water is obtained by

Options

(a) boiling water (b) fractional distillation of H₂O (c) prolonged electrolysis of H₂O (d) heating H₂O₂

Correct Answer:

prolonged electrolysis of H₂O

Explanation:

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Para and ortho-hydrogen differ in

Options

(a) atomic number (b) atomic mass (c) spins of proton (d) number of neutron

Correct Answer:

spins of proton

Explanation:

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The boiling point of heavy water is

Options

(a) 100⁰C (b) 101.4⁰C (c) 99⁰C (d) 110⁰C

Correct Answer:

101.4⁰C

Explanation:

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Which of the following statement is correct

Options

(a) Hydrogen will not be liberated at anode (b) Hydrogen has oxidation number of -1 and +1 (c) Hydrogen has same ionization potential as alkali […]

Which of the following is heavy water

Options

(a) H₂O (b) H₂O₁₈ (c) D₂O (d) H₂O₁₆

Correct Answer:

D₂O

Explanation:

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