Identify the correct statement(s) with respect to the following reaction :
Zn + 2HCl \(\longrightarrow\) ZnCl₂ + H₂
(i) Zinc is acting as an oxidant
(ii) Chlorine is acting as a reductant
(iii) Hydrogen is not acting as an oxidant
(iv) Zn is acting as a reductant

(a)

only (ii)

(b)

only (iv)

(c)

both (ii) and (iii)

(d)

both (ii) and (i)

The mass of one mole of CaCl₂ is _____________.

(a)

55.5 g mol^-1

(b)

111 g mol^-1

(c)

222 g mol^-1

(d)

77.5 g mol^-1

Mass number is equal to the ________

(a)

number of protons + number of electrons

(b)

number of protons + number of neutrons

(c)

number of neutrons + number of electrons

(d)

number of electrons

What are the values of n, I, m and s for 3p_x electron?

(a)

3,2,1,0

(b)

3,1,-1,+1/2

(c)

3,2,+1,-1/2

(d)

3,0,0,+1/2

The longest form of periodic table was constructed by______

(a)

Dmitri Mendeleev

(b)

Henry Moseley

(c)

Lothar Meyer

(d)

Newlands

Which of the following reactions increases the production of di-hydrogen from synthesis gas?

(a)

\(CH_4(g)+H_2O(g)\xrightarrow[Ni]{1270k}CO(g)+3H_2(g)\)

(b)

\(C(s)+H_2O(g)\xrightarrow{1270k}CO(g)+H_2(g)\)

(c)

\(CO(g)+H_2O(g)\xrightarrow[catalyst]{673k}CO(s)+H_2(g)\)

(d)

\(C_2H_6(g)+2H_2O(g)\xrightarrow[Ni]{1270k}2CO(g)+5H_2(g)\)

Assertion: Na₂SO₄ is soluble in water but BaSO₄ is insoluble
Reason : Lattice energy of barium sulphate exceeds its hydration energy.
Codes:
(a) Both assertion and reason are true and reason is the correct explanation for assertion
(b) Both assertion and reason are true but reason is not the correct explanation for assertion
(c) Assertion is true but reason are false
(d) Both assertion and reason are false.

(a)

Both assertion and reason are true and reason is the correct explanation for assertion

(b)

Both assertion and reason are true but reason is not the correct explanation for assertion

(c)

Assertion is true but reason are false

(d)

Both assertion and reason are false.

Which one of the following alkali metals is highly reactive with water?

(a)

Li

(b)

Cs

(c)

Rb

(d)

K

Partial pressure is given as ________________

(a)

\(\frac { mole\ fraction }{ total\ pressure } \)

(b)

mole fraction \(\times\) total pressure

(c)

\(\frac { mole\ fraction\times total\ pressure }{ 2 } \)

(d)

\(\frac { 2\times mole\ fraction }{ total\ pressure } \)

Which of the following is a monoatomic gas in nature?

(a)

Oxygen

(b)

Hydrogen

(c)

Helium

(d)

Ozone