Explore topic-wise InterviewSolutions in .

Which of the following can be used to prevent rusting of iron?

Fill in the blank:
$K_{2}C{O}_3+HCl\to$___________

What is a compound?

Upto which element, the Law of Octaves was found to be applicable

Explain the factors which govern the state of matter.

(4 marks)

Balance the following equation b hit and trial method :. NH4Cl + Ca(OH)2 ------------> CaCl2 + H2O + NH3

In the following table the mass number and the atomic number of certain elements are given

Making use of these data find. 1. Cation 2. Anion 3.a pair of isotopes 4. an atom of noble gas

A non-metal X reacts with concentrated nitric acid to form carbon dioxide, water and nitrogen dioxide. What is X?

A+B$⟶$$A_3{B}_2$(unbalanced)$A_3{B}_2$+C$⟶$$A_3{B}_2{C}_2$(unbalanced)

Above two reactions are carried out by taking 3 moles each of A and B and one mole of C. Then which option is wrong

²₁H and ³₁H are _______ .

Match the lists and find the correct option

$\begin{array}{cccc}& \text{I}& & \text{II}\\ \text{(a)}& \text{Early seed production in conifers}& \text{(i)}& \text{indole substance}\\ \text{(b)}& \text{Seed development and maturation}& \text{(ii)}& \text{Terpene substance}\\ \text{(c)}& \text{Lateral shoot growth}& \text{(iii)}& \text{Volatile substance}\\ \text{(d)}& \text{Root hair formation}& \text{(iv)}& \text{adenine derivative}\\ & & \text{(v)}& \text{Carotenoid derivative}\end{array}$

Explain the rule according to which electrons are filled in various energy levels.

Latent heat of fusion is the amount of heat energy required to change:

The value of zero kelvin on Celsius scale is

Calculate the molecular mass of nitric acid, $HN{O}_3$.

(Atomic masses: H = 1 u; N = 14 u; O = 16 u)

What is meant by Solubility?

Dry ice is :

Name the property of any one of the components which can be used for separating the following mixture :

Salt and Camphor

The correct order of bond angle is:

Question 39
Arrange the following elements in the increasing order of their metallic character Mg, Ca, K, Ge, Ga

A mixture of hydrogen and chlorine occupying $36c{m}^3$ exploded. On shaking it with water, $4c{m}^3$ of hydrogen was left behind. Find the composition of the mixture

Since every substance has its state of matter(solid ,liquid or gas) then is gel a solid or a liquid?

Who proposed the law of conservation of mass?

The components of a solution are:

Which of the following element is used in the treatment of cancer?

Out of the following, which one is an example of a molecule of an element?

Which of the following metals does not give hydrogen with acids?

The molecular formula of a compound is C₂H₆O. Name its homologous series.

Define a compound. Give two evidence to show that NaCl is a compound

___ thin foil was used by Rutherford for $alpha$- scattering experiment.

1. Gold

   
   

The hybridization of any of the Carbon atoms in $C_2{H}_2$ is

The smell of hot sizzling food reaches you several metres away but to get the smell from cold food you have to go close why it so

The flame under a wistling cooker is suddenly put off. The whistle is then removed to release the steam and the lid is forcibly opened . You see water is still boiling in the cooker even when no flame is underneath it. Explain why?

The mass number of two atoms X and Y is the same (40 each) but their atomic numbers are different (being 20 and 18 respectively). X and Y are examples of :

(a) chemically similar atoms

(b) isotopes

(c) solid and liquid metals

(d) isobars

Which of the following substances, when mixed with water, do not leave a residue when passed through a filter paper?

1. 17

Dalton's atomic theory says that atoms are indivisible. Is this statement still valid? Give reasons for your answer.

State the number of electrons present in the outermost shell of the atoms of the following elements.
(i) Neon
(ii) Chlorine

Please define the properties mentioned below.
i. Rigidity
ii. Compressibility
iii. Fuidity,
iv. Filling a gas container
v. Shape. [5 MARKS]