Test Details

Combustion and Flame, Sound and 1 other Topics

Dec 18, 9:12 PM

20 minutes

Dec 18, 9:32 PM

60.0 marks

MCQ

30 questions

GEETANJAN ROY

Marks obtained in class xii -96 {2011} batch Kendriya_vidyalaya Masters in MATHEMATICS {CSJM University} Specialization in NUMERICAL ANALYSIS. Diploma in COMPUTER TECHNOLOGY APPLICATION Experience of 9 years in Teaching . { with special focus in Doubt clearing } Cracked Govt Exams SBI APPRENTICE , SSC_MTS Scored 48/50 in SSC_CGL T-1

Class Details

Mathematics

Tanushree

Mathematics

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Question Text

Question 1 :
State TRUE or FALSE: It is difficult to burn a heap of green leaves but dry leaves catch fire easily.

Question 2 :
Fill in the blank: Fire produced by oil cannot be controlled by _________.

Question 4 :
The conditions under which combustion can take place is/are (i) Presence of fuel (ii) Air (or oxygen) (iii) Ignition temperature

Question 6 :
Fill in the blank: Fuel must be heated to its _________ before it starts burning.

Question 7 :
Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?

Question 8 :
Fill in the blank: A liquid fuel used in homes is __________.

Question 10 :
Fill in the blank: Burning of wood and coal causes __________ of air.

Question 11 :
The plants found in a particular area is termed as ______ ?

Question 12 :
Which of the following is the first Reserve Forest of India?

Question 13 :
What is that part of the earth in which living organisms exist or which supports life?

Question 14 :
Endemic species are those species of plants and animals which are found exclusively in a particular area. Is it TRUE OR FALSE?

Question 17 :
What will happen if the top layer of the soil is exposed?

Question 18 :
Removal of the top layer of the soil exposes the lower, hard and rocky layers. This soil has less humus and is less fertile. Gradually the fertile land gets converted into deserts. It is called __________?

Question 20 :
To protect our flora and fauna and their habitats, protected areas called _______?

Question 26 :
State True or False: If the amplitude of vibration is large, sound is feeble.

Question 27 :
The number of oscillations per second of a vibrating object is called its time period. True or false ?

Question 29 :
A pendulum oscillates 40 times in 4 seconds. Find its frequency.

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