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In a plant, smooth seeds (S) are dominant over wrinkled seeds (s) and green seeds (G) are dominant over yellow seeds (g). A plant homozygous for smooth and green seeds is crossed with a plant having wrinkled and yellow seeds. The F₁ offsprings are self crossed to produce F₂ generation. If a total of 160 offsprings are produced, how many plants are expected to be having wrinkled and green seeds in F₂ generation, according to a typical Mendelian cross?

A 90
B 30
C 20
D 10

X is present in the stomach. However, presence of excess of it causes indigestion, which requires the intake of milk of magnesia to undo the effect of X. What is X?

AHCl
BH₂SO₄
CNaOH
DKOH

Refer to the given Venn diagram and select the correct option.


AP - Sedimentation and decantation
BQ - By using separating funnel
CR - Filtration
DAll of these

Which of the following statements is/are incorrect regarding the given figures X and Y?

1. X depends partly on animals for food but can also make its own food while Y cannot make its own food.
2. X has chlorophyll while Y does not contain chlorophyll and is non-green.
3. In X, food is prepared by the green stem, whereas Y obtains its food from dead and decaying plants and animals.
4. X and Y have patches of green colour. Only green part of their leaves performs photosynthesis.

A1, 3 and 4 only
B2 and 3 only
C1 and 4 only
D3 and 4 only

Read the given statements and select the correct option.
Statement 1 : Physical change does not affect the composition of matter.
Statement 2 : Chemical change results in the formation of new substance with different properties.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false.

A scientist took a metal rod and a wooden rod and wrapped each of them in a piece of paper. These were then heated as shown. It was found that the paper around the metal rod does not burn whereas the one around the wooden rod catches fire. It is because


AMetal being a good conductor, conducts away the heat given to the paper
BWood being an insulator, takes away all the heat
CCandle in case of iron rod, is near to the paper
DNone of these.

Which of the following is NOT a healthy eating habit?

AEating low fibre diet, as it will help the digestive system to work better
BChewing the food properly
CWashing hands before and after the meal
DAvoiding ddrinking water immediately after a meal

The given numbers are to be coded with the following conditions:



AXNWRSLOX
BXNPRSLOX
CWNWRSLOX
DXNPRSLOT

Refer to the given graph plotted for three different fabric pieces of equal size P, Q and R on the basis of their water absorbing capacity and select the correct statement.


AP is made up of fibres obtained from Gossypium plant whereas R is made up of fibres obtained from an insect.
BQ is made up of protein fibres obtained from an insect whereas R is made up of cellulose fibres obtained from flower of a plant.
CR is made up of fibres obtained from plant stem by the process of retting whereas P is made up of fibres obtained from plant seed by the process of ginning.
DP is biodegradable whereas Q and R are non-biodegradable.

Which of the following statements is/are true for the mass of the substance deposited at the cathode?
(i) It is inversely proportional to quantity of electricity passed through electrolyte.
(ii) It is directly proportional to quantity of electricity passed through electrolyte.
(iii) It is directly proportional to the time for which electricity is passed through the electrolyte.
(iv) It is inversely proportional to the time for which electricity is passed through the electrolyte.

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