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OTI365 - NTSE - X Standard
NTSE SAT Physics - Heat Sample Questions with Answer

NTSE SAT Physics - Heat

Exam Duration: 45 Mins Total Questions : 30

1 )

When the temperature increases the density of a substance

(a)
decreases
(b)
increases
(c)
first increase then decreases
(d)
first decrease then increases

2 )

When water is heated from 0⁰C, its volume

(a)
remains the same
(b)
decrease till 4⁰C
(c)
increases
(d)
first increases then decreases

3 )

Steam at 100°C causes more severe burns than water at the same temperature because

(a)
steam gives more heat
(b)
steam cannot do work
(c)
steam is a gas
(d)
steam is highly combustible

4 )

When salt is properly mixed with ice, the melting point of ice

(a)
lowered
(b)
raised
(c)
becomes infinite
(d)
remains the same

5 )

Glaciers always melt first at the

(a)
top surface
(b)
sides
(c)
bottom
(d)
middle surface

6 )

When the coffee in thermos flask is vigorously shaken then the temperature of the coffee will

(a)
fall
(b)
increase slightly
(c)
remain the same
(d)
never be determined

7 )

The amount of heat required to raise the temperature of 100 g of copper from 20°Cto 70°C [specificheat capacity of c~per 390 J kg-1°C^-1]

(a)
1950J
(b)
3900J
(c)
1650J
(d)
780J

8 )

Which number indicates where a then no meter should be placed to determine the boiling point of a distillate?

(a)
1
(b)
2
(c)
3
(d)
4

9 )

x, y, z represent the three states of matter. Which of the following is correct?

(a)
y evaporates more than x
(b)
y evaporates less than z
(c)
x & y evaporates at the same rate
(d)
x evaporates more readily than z

10 )

When 50 cal of heat are supplied to 25 g of water, the rise in temperature is

(a)
75⁰C
(b)
2⁰C
(c)
125⁰C
(d)
15⁰C

11 )

When we cool a gas below its condensation point, the K.E of its molecules

(a)
increases
(b)
decreases
(c)
remains the same
(d)
first increases then decreases

12 )

A temperature difference of 33°C on the kelvin scale is

(a)
316 K
(b)
243 K
(c)
zero
(d)
33K

13 )

Two liquids have the densities in the ratio of 1 : 4 and specific heats in the ratio of 4 : 1. the ratio of thermal capacity of equal volume of those liquids is

(a)
1:4
(b)
1:16
(c)
1:1
(d)
2:1

14 )

At what temperature do the Fahrenheit and celsius scales give the same reading

(a)
0°
(b)
273°
(c)
574°
(d)
-40⁰

15 )

At what temperature the measurement on Fahrenheit is double of Celsius

(a)
160⁰
(b)
120⁰
(c)
100⁰
(d)
40⁰

16 )

Heat conduction is the property of:

(a)
Non-metal
(b)
Metal
(c)
Metalloids
(d)
All of these

17 )

New technologies have been developed to provide thermal energy, without scorching your body. One of these has micro sensors that work like invisible thermostats, that measure the temperature of different parts of your body and generate thermal energy accordingly. This technology is

(a)
Still in the development stage
(b)
Found only in research labs
(c)
An electric blanket
(d)
Thermal underwear

18 )

A technology that has replaced boiling water over an open campfire gives us a warning when the water is boiled. This technology is

(a)
A micro-sensing digital boiler
(b)
A solar powered water heater
(c)
An electric kettle
(d)
A hot water heater

19 )

Energy is the measure of something's ability to do work.Which of the following has the most thermal energy?

(a)
A dead battery
(b)
A melted slurpee
(c)
A swimming pool
(d)
A cup of hot chocolate

20 )

Solids made of different metals were all heated to 100°C to determine how their volume and length would be affected. Which statement describes the most likely outcome of this experiment?

(a)
All the volumes changed the same amount and the lengths remained constant
(b)
All the volumes changed, but each substance was of the same length
(c)
Only some of the volumes changed with their length being increased
(d)
All the volumes changed and so did their lengths

21 )

An experiment testing the effect of heat on different liquids was performed by some students. Which of the following variables would have been the manipulated variable?

(a)
The amount of heat used
(b)
The different types of liquids
(c)
The size and type of glass tubing each liquid would rise
(d)
The different levels of each of the liquids reached in the glass tubing

22 )

The transfer of energy in a fluid is very different. The heated particles become less dense and so they rise, with the cold, the denser particles rush in to take their place. This type of thermal energy transfer creates a:

(a)
Conduction current
(b)
Concurrent current
(c)
Radiative pathway
(d)
Convection current

23 )

Thermal energy from inside the Earth's crust can be harnessed as a useful thermal energy source. Volcanoes, hot springs and geysers are example of this type of thermal energy source. This type of thermal energy is