Study the given flow chart and select the option which correctly identifies P, Q, R and S.
|A||Sulphur dioxide||Water vapour||UV rays||Oxygen|
|B||Oxides of nitrogen||Oxygen||UV rays||Nitrogen|
|C||Sulphur dioxide||Carbon dioxide||CFCs||Ozone|
|D||Oxides of nitrogen||Methane||UV rays||Helium|
Which of the following statements are correct?
(i) Wheels of a car moving at a constant speed undergo linear, rotational as well as periodic motion.
(ii) A hockey player running after the ball during a match undergoes linear and periodic motion.
(iii) The pendulum of a clock undergoes periodic and oscillatory motion.
A(i) and (ii) only
B(ii) and (iii) only
C(i) and (iii) only
D(i), (ii) and (iii)
Read the given statements and select the correct option.
Statement 1 : Roughage do not give us any nutrients but it prevents constipation.
Statement 2 : Roughage adds bulk to the faeces and keeps it soft, to ensure the smooth movement of waste down the intestine and colon.
ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DBoth statements 1 and 2 are false.
Nitika, a class 8 student performed a few experiments
to study the reactivity of metals. She summarised her
observations in the given table.
Identify W, X, Y and Z.
answer has to be Aonly sodium and potassium react with cold water
Ashish was performing an experiment by setting up an arrangement as shown in the figure.
Which of the following relations holds correct regarding the amount of water that got collected in beakers 1, 2 and 3 after an hour?
A Beaker 1 > Beaker 2 > Beaker 3
B Beaker 1 > Beaker 3 > Beaker 2
C Beaker 3 > Beaker 1 > Beaker 2
D Beaker 3 > Beaker 2 > Beaker 1
The correct answer should be A because water is least absorbed by sandy soil and is absorbed the most by clayey soil.