Hydrogen Test

Result

Hydrogen Test - 63

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Weekly Quiz Competition

Question 1
1 / -0

Select the incorrect statement.

A
Water can act as an acid as well as a base

B
During photosynthesis water is oxidised to $$O_2$$

C
In molecular $$CuSO_4.5H_2O$$, all five $$H_2O$$ molecules are hydrogen bonded

D
Density of water is maximum at $$4^oC$$

Solution

The hydrogen-bonded water molecule that is associated with CuSO4 5H2O is 10. In CuSO4 5H2O Cu is coordinated with 4 water molecules and two oxygen atoms from sulfate ion. The fifth water molecule is hydrogen-bonded and is deeply embedded in a crystal.
Water gives proton to any solution and so it is called as an acid. Water also has the ability to give hydroxide ion and so it acts as a base too.
The part of photosynthesis involves the oxidation of the oxygen from water. Each O atom loses two electrons so oxygen in water is oxidized.
The maximum density of water occurs at 4 degrees Celsius because at this temperature two opposing effects are in balance.
Question 2
1 / -0

Hydrogen differ with alkali metals in which of the following aspect ?

A
Formation of halides

B
Formation of oxides

C
Metallic character

D
Atomicity
Question 3
1 / -0

Structure of $$H_2O_2$$ is:

A
planar

B
non-planar

C
linear

D
three- dimensional open cage

Solution
Question 4
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Among the following in which hydrates $$H_{2}O$$ molecules only occupy the interstitial site?

A
$$BaCl_{2}.2H_{2}O$$

B
$$[Ni(H_{2}O)_{6}]^{2+}(NO_{3}^{-})_{2}$$

C
$$CuSO_{4}.5H_{2}O$$

D
$$All\ of\ these$$

Solution
Question 5
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The $$O-H$$ bond length in $$H_2O$$ is $$xA^o$$. The $$O- H$$ bond length in $$H_2O_2$$ is ?

A
$$< x$$ $$A^o$$.

B
$$x$$ $$A^o$$.

C
$$ > x$$ $$A^o$$.

D
$$2x$$ $$A^o$$.

Solution
Question 6
1 / -0

The least stable hydride of $$15^{th}$$ group elements is

A
$$NH_3$$

B
$$PH_3$$

C
$$AsH_3$$

D
$$SbH_3$$

E
$$BiH_3$$

Solution
Question 7
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Which among the following cannot be used to generate $${{\text{H}}_{\text{2}}}$$?

A
$${\text{Al}}\,{\text{ + NaOH}}$$

B
$${\text{Zn + NaOH}}\,$$

C
$${\text{Mg + NaOH}}$$

D
$${\text{LiH + }}{{\text{H}}_{\text{2}}}{\text{O}}$$

Solution

Magnesium reacts with sodium hydroxide to form magnesium hydroxide and sodium metal.
$$Mg\ +\ 2NaOH \longrightarrow Mg(OH)_2\ + 2Na$$
Question 8
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Which of the following pair behaves strong and weak base hydride :

$$NH_3, PH_3, AsH_3, SbH_3, BiH_3$$

A
$$NH_3, PH_3$$

B
$$NH_3, BiH_3$$

C
$$PH_3, BiH_3$$

D
$$BiH_3, AsH_3$$
Question 9
1 / -0

Which of the following represents saline hydrides?

A
$$KH,\,Ca{H_2},\,Ba{H_2}$$

B
$$NaH,Si{H_4},KH$$

C
$$N{H_3},{B_2}{H_6},Al{H_3}$$

D
$$N{H_3},{H_2}O,HF$$

Solution
Question 10
1 / -0

Property higher for $$H_{2}O$$ than $$H_{2}O_{2}$$

A
Dielectric constant

B
Viscosity

C
Melting point

D
Boiling point

Solution