Explore topic-wise InterviewSolutions in .

Choose the correct option based on the statements given below:

Statement 1: Carbon always shares electrons or forms a covalent bond with other elements.

Statement 2: $C^{4+}$ and $C^{4-}$ ions are highly unstable.

What can combine to form a molecule?

(a) Which metal did Rutherford select for his $\alpha$ particle scattering experiment and why?

(b) What do you think would be the observation of $\alpha -$ particle scattering experiment if carried out on

(i) heavy nucleus like platinum

(ii) light nuclei like lithium.

Atomic radius ___ , moving from left to right across a period.

Which of the following contains a coordinate covalent bond?

Identify the products of the given reaction.
${\text{Na}}_2{\text{CO}}_3\text{(aq)}+{\text{H}}_2{\text{SO}}_4\text{(aq)}\to ?$

The polynuclear hydrocarbons possessing carcinogenic property are formed from Organic materials by:

Is smell and smell of perfume matter?

In Ni(CO)₄ the oxidation number of Ni is

a.2

b.0

c.4

d.8

A solution is said to be ___________ if it can hold more of the solute in the given solvent at that temperature

The gas having same number of molecules as $16g$ of oxygen is

The oxidation number of chlorine in HOCl is:

An atom has electronic configuration 2, 8, 7.
To which of the following elements would it be chemically similar? (Atomic numbers are given in parentheses.)

Which one of the following is not equal to gram molecular mass of nitrogen?

Explain mono atomic, di atomic and tri atomic molecules. [3 MARKS]

Question 4
Suggest a method to liquefy atmospheric gases.

The part of the earth's surface that contains water is called

Which of the following is water gas?

Is there any difference between true solution and solution

Q 1

Calculate the number of calcium ions in 5.6 gram of calcium oxide

Q2 calculate the mass of 12.0 x 10 ¹⁴atoms of hydrogen

Chlorine has 7 electrons in its outermost orbit, so the ion that it forms to get stable is ___ charged.

The part of an atom where nearly the entire mass of atom is concentrated is:

Which one of the following is/are correct statement(s) with respect to Mendeleev's periodic table?

Give one example of the diffusion of a solid in another solid.

Have you ever thought how do aquatic plants and animals survive? From where do they get oxygen? [3 MARKS]

Which catalyst is used to produce sulphur trioxide from sulphur dioxide in contact process?

The rate of evaporation ___ as the humidity in surrounding ___

Give a detailed explanation of all gas laws with examples of questions solutions

Which of the following displaces oxygen from water?

F₂, Cl₂, Br₂, I₂

Consider the chemical reaction

$N_2\left(g\right)+3H_2\left(g\right)⟶2N{H}_3\left(g\right).$

The rate of this reaction can be expressed in terms of time derivatives of the concentration of $N_2\left(g\right),H_2\left(g\right),orN{H}_3\left(g\right).$ Identify the correct relationship among the rate expressions.

Choose the correct answer:
(a) The graph of PV vs P for a gas is
(i) Parabolic
(ii) Hyperbolic
(iii) a straight line parallel to X- Axis
(iv) A straight line passing through origin
(b0 the absolute temperature value that corresponds to ${27}^{\circ }C$ is
(i) 200 K (ii) 300 K
(iii) 400 K (iv) 246 K
(c) Volume temperature relationship is gien by
(i) Boyle (ii) GAy Lussac
(iii) Dalton (iv) Charles
(d) If pressure is doubled for a fixed mass of a gas, its volume will become
(i) 4 times (ii) $\frac{1}{2}$ times
(iii) 2 itmes (iv) No change

State :

(i) natural sources of air pollution

(ii) man-made sources of air pollution

Why is Na(HCO_{​​​​3})₂ used in health salts?

The number of valence electrons in a graphite atom is :

(a) 2

(b) 4

(c) 3

(d) 5

Two atoms are said to be isobars if-

What happens when electric current is passed through ionic hydride in molten state?

One day you were boiling water for making tea, you observed that at a certain point, the temperature of the solution became constant. Identify a correct reason.

An active metal reacts with water to produces:

Ammonium chloride and salt is separated by the process of ______________. The volatile component in this case is ______________.