The unit of ‘g’ is m s^-2. It can be also expressed as ______.

Which of the following lens would you prefer to use while reading small letters found in a dictionary?

The value of universal gas constant

Which of the following represents 1 amu?

Which of the following have inert gases 2 electrons in the outermost shell.

Which of the following is hygroscopic in nature?

Which is formed during anaerobic respiration

Mammals are ______________ animals.

Which one of the following shows correct composition of blood?

Nerve cells do not possess

To increase the sugar production in sugarcanes they are sprayed with _______

Syngamy results in the formation of____________

Define dispersion of light.

What is co-efficient of apparent expansion?

Give any two examples for heterodiatomic molecules.

State two conditions necessary for rusting of iron.

Define the term: Solution.

Name the phenomenon by which carbohydrates are oxidized to release ethyl alcohol.

What is the shape of RBC in human blood?

Which hormone induces parthenocarpy in tomatoes?

When is World Menstrual Hygiene Day observed?

Weight of a person inside the lift while at rest is 50 N. What is the weight he feels when lift moves up with an acceleration of 9.8 ms^-2.

Two bodies have a mass ratio of 3:4 The force applied on the bigger mass produces an acceleration of 12 ms^-2. What could be the acceleration of the other body, if the same force acts on it.

Find the final temperature of a copper rod. Whose area of cross section changes from 10 m² to 11 m² due to heating. The copper rod is initially kept at 90 K. (Coefficient of superficial expansion is 0.0021 /K)

Calculate the % of oxygen in Al₂(SO₄)₃. (Atomic mass: Al-27, O-16, S -32).

The electronic configuration of metal A is 2,8,18,1.
The metal A when exposed to air and moisture forms B a green layered compound. A with con. H₂SO₄ forms C and D along with water. D is a gaseous compound. Find A,B,C and D.

a) What happens when MgSO₄.7H₂O is heated? Write the appropriate equation
b) Define solubility

Leeches do not have an elaborate secretion of digestive juices and enzymes -Why?

Who discovered Rh factor? Why was it named so?

Differentiate between Medullated and non-medullated nerve fibre.

What are chemical messengers?

How will you determine the atomicity of gases using Avogadro's hypothesis?

Deduce the equation of a force using Newton’s second law of motion.

List any five properties of light.

1. Calcium carbonate is decomposed on heating in the following reaction
CaCO₃ → CaO + CO₂
i. How many moles of Calcium carbonate are involved in this reaction?
ii. Calculate the gram molecular mass of calcium carbonate involved in this reaction.
iii. How many moles of CO₂ are there in this equation?

'A' is a blue coloured crystalline salt. On heating it loses blue colour and to give 'B'. When water is added, 'B' gives back to 'A'. Identify A and B, write the equation.

Illustrate the structure and functions of brain.

In angiosperms the pollen germinates to produce pollen tube that carries two gametes. What is the purpose of carrying two gametes when single gamete can fertilize the egg?