According to carbon compounds, which of the following are correct?

1. They are good conductors of electricity.
2. They are poor conductors of electricity.
3. They do not have strong force of attractions between the molecules.
4. They are formed by transferring of electrons.

What is the form of carbon in the atmosphere?

1. CO
2. CO in traces of CO₂
3. CO₂
4. Coal

Which of the following is correct according to the covalent bond?

1. They have high melting and boiling point.
2. They are formed in between the metals and non-metals.
3. Covalent compounds are mostly soluble in water.
4. They are formed by the sharing of electrons.

How many single covalent bonds are present in methane?

1. 1
2. 2
3. 3
4. 4

Which one of the following is incorrect according to the ionic compound?

1. They have high melting and boiling point
2. Ionic bond is formed by transferring of electrons
3. Ionic bond is formed by sharing of electrons
4. Ionic bonds are the good conductors of electricity

How many bonds can a carbon form when its electronic configuration is 2, 4?

1. 1
2. 2
3. 3
4. 4

How does carbon occur in a combined state?

1. Graphite
2. Lamp black
3. Coal
4. Sugar

Identify the pair of organic compounds from the following?

1. Calcium bicarbonate
2. Copper carbonate 
3. Carbon monoxide 
4. Benzene 

Which of the following is not an organic compound?

1. Glucose
2. Methane
3. Carbon dioxide
4. Acetic acid

An object is moving at a uniform speed in a counter clockwise direction in a uniform circular motion. At the location shown, the centripetal force stops acting on the object. Which path will the object follow?

A boy is sitting in a merry-go-round.  The time period of circular motion is 5 sec, and its speed of rotation is 70 m/s. What is the radius of the circle formed?

1. 5.573 m
2. 55.73 m
3. 557.3 m
4. 5573 m

Richa is sitting in a merry-go-round.  The time period of circular motion if it forms a circle of 56 m radius. The speed of rotation is 40 m/s.

1. 2.8 pi s
2. 280 pi s
3. 0.14 pi s
4. 28 pi s

A girl is sitting in a merry-go-round.  The time period of circular motion of the merry-go-round is 8 sec and it forms a circle of 40 m radius. What is the speed of rotation?

1. 30.9 m/s
2. 810.4 m/s
3. 480.34 m/s
4. 31.4 m/s

What is the direction of the velocity at point mentioned if the ball is revolving anticlockwise?

At point D

1. Up
2. Down
3. Left
4. Right

What is the direction of the velocity at point mentioned if the ball is revolving anticlockwise?

At point C

1. Up
2. Down
3. Left
4. Right