Training & POC

Q.

Metal carbonates and hydrogen carbonates react with acids to give

1. Carbon dioxide

2. Hydrogen gas

3. Sulphur dioxide gas

4. Carbon monoxide gas

Q. Amongst the following animals, who has the shortest small intestine?

निम्नलिखित में से कौनसे जंतु में सबसे छोटी क्षुद्रांत्र होती है?

1. Human
   
   मानव
2. Elephant
   
   हाथी
3. Lion
   
   शेर
4. Cow
   
   गाय

Q. Explain laws of reflection.

Q. If the graph of a quadratic polynomial is a downward opening parabola, then its quadratic coefficient is a .

1. positive number
2. negative number
3. natural nunber
4. whole number

Q. Stars appear to twinkle in the night sky due to:

1. Reflection
2. Dispersion
3. Refraction
4. All of the above.

Q.

What are the two types of respiration?

Q.

The equation $(x–2)(x+1)=(x–1)(x+3)$ is a quadratic equation.

1. True

2. False

Q.

Matter is made up of extremely small particles called ___.

Q.

Laws of reflection are not valid in the case of irregular reflection.

1. True

2. False

Q.

In what ways are animals useful to us?

Q. When magnesium reacts with dilute hydrochloric acid, bubbles are formed due to the liberation of gas.

1. oxygen
2. chlorine
3. hydrogen

Q.

Convex mirror is also known as _______.

1. Diverging mirror

2. lano-concave mirror

3. Converging mirror

4. Plano-convex mirror

Q.

What does the equation given below represent?

$C_6{H}_{12}{O}_6+6O_2⟶6C{O}_2+6H_{2}O+Energy$

1. Cellular Respiration

2. Inspiration

3. Photosynthesis

4. Breathing

Q.

Acids and bases react to form salt and water.

1. True

2. False

Q.

Total internal reflection of light can occur when light travels from __________.

1. air to glass

2. air to water

3. water to air

4. vacuum to air

Q.

How does bagging differ from emasculation?

Q. The chemical name of teflon is .

1. polytetrafluoroethene
2. polytetrafluoroethane
3. polytetrafluoroprene

Q.

Which of the following is/are not a quadratic equation?

1. $3x^2–4=0$

2. $2x=x^2$

3. $x+5=3$

4. $x^2–8x+5=0$

Q.

Compare and contrast the arrangement of elements in Mendeleev’s Periodic Table and the Modern Periodic Table.

Q. Electrolysis of water is an example of reaction

1. Decomposition
2. Combination
3. Redox

Q. Which among the following is the world's tallest mountain range?

1. Andes range
2. Alps range
3. Himalayan range
4. Karakoram range

Q. Regarding the assertion and reason, choose the correct option.
Assertion: Clonal selection is a method of breeding in sugarcane.
Reason: Sugarcane is propagated through suckers

1. Both Assertion and reason are true and the reason is the correct explanation for assertion.
2. Both assertion and reason are true but reason is not the correct explanation for assertion.
3. Assertion is true but reason is false
4. Both assertion and reason are false

Q.

The acid which is present in our body is ________.

1. Formic acid

2. Hydrochloric acid

3. Tartaric acid

4. Sulphuric acid

Q. How many single unit cubes are there in this Rubik's cube?

1. 27

Q. The volume of a cylinder of radius 7 cm and height 10 cm is $c{m}^3$.

1. 220
2. 1440
3. 1540

Q. Which part of the seed grows into the root upon germination?

1. Embryo
2. Radicle
3. Plumule
4. Cotyledon

Q. Acetic acid is a weak acid because:

1. It gets highly ionised in water.
2. It gets weakly ionised in water.
3. Its aqueous solution is acidic.
4. It contains four hydrogen atoms.

Q. Question 2
The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?

(a) Between the principal focus and the centre of curvature
(b) At the centre of curvature
(c) Beyond the centre of curvature
(d) Between the pole of the mirror and its principal focus

Q.

Aqua regia is a mixture of concentrated hydrochloric acid and concentrated nitric acid in the ratio ___.

1. 1:2

2. 1:1

3. 1:3

4. 3 :1

Q. The distance between the object and the image from a plane mirror will always be in the ratio .

1. 1:1
2. 1:2
3. 2:1