Characteristics of two fuels X and Y are given in chart. Characteristics Fuel X Fuel Y Calorific value 50 KJ / g 80 kJ / g Gases produced on burning CO , SO 2 CO 2 Ignition temperature 20 ° C 80 ° C Which fuel is ideal fuel?

Fuel Y , because it has higher calorific value and is producing only CO 2

Fuel X , because it has lower ignition temperature and lower calorific value

Fuel Y , because it has higher ignition temperature and lower calorific value

Fuel X , because it has lower ignition temperature and is producing CO and SO 2

Ocean Thermal Energy Conversion

Oil Transformation of Energy in Cells

Characteristics of two bombs P and Q are given in the chart below. Mass Number: 235 2 Size: Large Small Reaction: Nuclear Fission Nuclear fusion Identify P and Q .

P is atom bomb and Q is hydrogen bomb

P is hydrogen bomb and Q is atom bomb

Both P and Q are hydrogen bombs.

EASY

10th Foundation

IMPORTANT

Earn 100

Fill in the blanks with most appropriate option.

Bio-gas is an excellent fuel as it contains up to $75 %$ (i)_. It burns without smoke, leaves no residue like ash in wood. Its heating capacity is (ii).The slurry left behind is removed periodically and used as excellent manure, rich in (iii) and (iv)_.

$(i)$ $(ii)$ $(iii)$ $(iv)$

$(A)$ Methane High Nitrogen Phosphorous

$(B)$ Nitrogen Low Methane Phosphorous

$(C)$ Methane Low Nitrogen Oxygen

$(D)$ Oxygen High Nitrogen Phosphorous

50% studentsanswered this correctly

Important Questions on Sources of Energy

MEDIUM

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 13 - Sources of Energy>EXERCISES>Q 1

Consider the following statements and select the correct option which correctly identifies true (T) and false (F).
$(i)$ Biogas is a combustible gas obtained by the anaerobic decomposition.
$(ii)$ Producer gas is a mixer of flammable gas only.
$(iii)$ In a nuclear reactor, the moderator is Uranium- $234$ .
$(iv)$ Wind speed should be lower than $15 km h^{- 1}$ to maintain the required speed of the turbine.

	$(i)$	$(ii)$	$(iii)$	$(iv)$
$(A)$	$T$	$T$	$T$	$F$
$(B)$	$T$	$T$	$F$	$F$
$(C)$	$T$	$F$	$F$	$F$
$(D)$	$F$	$F$	$F$	$T$

EASY

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 13 - Sources of Energy>EXERCISES>Q 2

Which of the following is incorrect statement regarding solar cooker?

MEDIUM

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 13 - Sources of Energy>EXERCISES>Q 3

Characteristics of two fuels $X$ and $Y$ are given in chart.

Characteristics	Fuel $X$	Fuel $Y$
Calorific value	$50 KJ / g$	$80 kJ / g$
Gases produced on burning	$CO, {SO}_{2}$	${CO}_{2}$
Ignition temperature	$20 ° C$	$80 ° C$

Which fuel is ideal fuel?

EASY

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 13 - Sources of Energy>EXERCISES>Q 4

Read the given statements and select the correct option.
Statement

1 :

The box-type solar cooker can be used for baking.
Statement

2 :

The box-type solar cooker can be used to cook only those food materials which require slow heating.

EASY

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 13 - Sources of Energy>EXERCISES>Q 5

OTEC stands for :

EASY

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 13 - Sources of Energy>EXERCISES>Q 6

Characteristics of two bombs

P

and

Q

are given in the chart below.

Mass Number:	$235$	$2$
Size:	Large	Small
Reaction:	Nuclear Fission	Nuclear fusion

Identify $P$ and $Q$ .

EASY

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 13 - Sources of Energy>EXERCISES>Q 7

In a nuclear reactor, the chain reaction stops if :

EASY

10th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 10>Chapter 13 - Sources of Energy>EXERCISES>Q 8

Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?

Important Questions on Sources of Energy

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