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What happens when a mixture of naphthalene balls and sand is heated?

ANaphthalene balls remain in the China dish.
BNaphthalene gets deposited on the outer end of the funnel.
CThe deposition of sand will take place on the inner cold surface of the funnel.
DSand is left in the China dish.

A ray of light parallel to the floor strikes a plane mirror, which is inclined at an angle 40° as shown in figure. What is the angle of reflection?


A40°
B80°
C50°
D90°

Shooting star is

Aa meteor
Ba meteorite
Ccomet
DAsteroid

Which of the following statements is/are incorrect?
I. When a solute is dissolved in a solvent, the mixture obtained is known as a solution.
II. Sand and water form a homogeneous mixture.
III. A solution which can dissolve more solute is known as an unsaturated solution.
IV. Threshing is a method used to separate lighter components of a mixture from the heavier ones by blowing air.

AI and II
BII and IV
CII, III and IV
DI and III

How many primary consumers are there in the given food web?



A2
B3
C4
D5

Read the following statements and select the correct option.
Statement 1: Water present in oceans and seas cannot be used directly for human consumption.
Statement 2 : Water in oceans and seas have less amount of dissolved oxygen.

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.
DStatement 1 is false but statement 2 is true.

Humans inherit colour of their eyes from their parents. Brown-eyed couple has three blue-eyed children. Which of the following statements gives correct explanation of this situation?
(i) Each parent has an allele for brown eyes and an allele for blue eyes.
(ii) The allele for blue eyes is recessive.
(iii) The probability that their next child will have blue eyes is 75%.
(iv) The probability that their next child will have brown eyes is 50%.

A (i) and (ii) only
B (i) and (iii) only
C (ii) and (iv) only
D (iii) and (iv) only

Cross pollination is the process of

ATransfer of pollen grains from anther of one flower to stigma of other flower on different plant of the same species.
BTransfer of pollen grains from anther of one flower to stigma of the same flower.
CTransfer of pollen grains from anther of one flower to stigma of another flower on different plant of different species.
DBoth A and C

Identify the symbols of given electric components.


A(i) - bulb, (ii) - open switch, (iii) - wire
B(i) - bulb, (ii) - closed switch, (iii) - resistance
C(i) - closed switch, (ii) - wire, (iii) - bulb
D(i) - resistance, (ii) - bulb, (iii) - wire

Study the given information carefully and answer the question.
(i) A, B, C, D, E, F and G are sitting along a wall and all of them are facing east.
(ii) C is on the immediate right of D
(iii) B is at an extreme end and has E as his neighbour.
(iv) G is between E and F.
(v) D is sitting third from the south end.
Who is sitting to the immediate right of E?

AA
BC
CD
DG