Free Printable Grade 11 and 12 Science Quiz Hots

Worksheets

Grade 11 and 12 Science Quiz Hots

Total questions: 20

Worksheet time: 20mins

Name

Class

Date

How many moles are in 225 g of CO?

28.01 mole

4.82 x 10²⁴mole

6,302,25 mole

8.0357 mole

What is the mass of 3.0 x 10²³atoms of neon?

1.0 g

0.5 g

9.97g

20.0 g

What is the total number of atoms contained in 80 grams of neon?

6.02 x 10²³

1.2 x 10²⁴

2.4 x 10²⁴

4.8 x 10²⁴

What is the percent composition of Benzene, C₆H₆?

C = 50%

H = 50%

C = 85.7 %

H = 14.3%

C = 92.3%

H = 7.7%

C = 71.9%

H = 28.1%

Displacement vectors of 4 km south, 2 km north, 5 km south, and 5 km north combine to a total displacement of

16 km north

11 km west

6 kn south

2 km south

A ball is rolled uphill a distance of 5 meters before it slows, stops, and begins to roll back. The ball rolls downhill 9 meters before coming to rest against a tree. What is the magnitude of the ball’s displacement?

4 meters

9 meters

14 meters

45 meters

A car traveled 60 km in 2 hours, 84 km in the next 1 hour, and then 68 km in 2 hours before reaching its destination. What was the car’s average speed?

212 km/hr

42 km/hr

148 km/hr

1060 km/hr

A river current has a velocity of 5 km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. How can the velocity of the boat relative to the shore be calculated?

by subtracting the river current vector from the boat’s velocity vector

by dividing the river current vector by the boat’s velocity vector.

by multiplying the vectors.

by adding the vectors.

Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 1 s. What is your acceleration?

2 m/s²

5 m/s²

4 m/s²

3 m/s²

10.

An object moving at 30 m/s takes 5 s to come to a stop. What is the object’s acceleration?

30 m/s²

-30 m/s²

-6 m/s²

6 m/s²

11.

A cable stretches by amount 'a' under a certain load. If it is replaced by a cable of the same sametrial but half as long and half the diameter,the same load will stretch it by.......

a/4

a/2

12.

At which of the following temperatures would the molecules of a ga have twice the average kinetic energy they have at 20 degree celcius

40 degree celcius

80 degree celcius

313 degree celcius

586 degree celcius

13.

A boy swings from a rope 4.9 m long. His approximate period of oscillation is...

0.5 s

3.1 s

4.4 s

12 s

14.

A charge q is placed at the centre of the line joining two equal charges Q.The system of the three charges will be in equilibrium if q is equal to.....

-(Q/2)

-(Q/4)

+(Q/4)

+(Q/2)

15.

The temperature of an object is raised by 50 degree. This is equivalent to an increase in its absolute temperature of....

50 K

323 K

223 K

82 K

16.

If Q1 is the heat absorbed by the working substance and Q2, is the heat utilized in doing work, then the efficiency of the engine is given by:

1 -(Q1/Q2)

1 -(Q2/Q1)

(1 - Q1)/Q2

(1 - Q2)/Q1

17.

Energy of electron of hydrogen atom in second Bohr orbit:

-5.44 x 10^-19 J

-5.44 x 10^-19 kJ

-5.44 x 10^-19 cal

-5.44 x 10^-19 eV

18.

Radius of the first Bohr's orbit of hydrogen atom:

1.06 Å

0.22 Å

0.28 Å

0.53 Å

19.

Na,Ca,Mg and Al are those metals which are extracted (a)

20.

Which of the following aqueous solutions should have the highest boiling point?

1.0 M NaOH

1.0 M Na2SO4

1.0 M NH4NO3

1.0 M KNO3

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Grade 11 and 12 Science Quiz Hots

Total questions: 20

Worksheet time: 20mins

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