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Which of the following statements is incorrect?

A Fibroin is the gummy substance that holds the two strands of sericin of a silk fibre together.
B Asbestos is the only naturally occurring long mineral fibre.
C Merino is an exotic breed of sheep.
D Hair present on body of wool-yielding animals trap a lot of air.

Given diagram shows the transverse section of a type of plant tissue. Select the option that represents the primary function of this tissue.


ATransportation of food
BFood storage
CWater transportation
DProtection from injuries

An earthquake of magnitude 6 on Richter scale is how many times more destructive than an earthquake of magnitude 4?

A100
B1000
C1500
D2000

Refer to the given flow chart and select the option that correctly identifies P, Q, R and S.M


AP-Betel; Q-Aloe; R-Ginger; S-Banyan
BP-Poison ivy; Q-Cactus; R- Potato; S-Ginger
CP-Passion flower; Q-Opuntia; R-Onion; S-Bougainvillea
DP-Money plant; Q-Aloe; R-Radish; S-Potato

Refer to the given figure and select the incorrect statement regarding its labelled parts.


AIf 'T' is removed at bud stage of flower, chances of damage to floral organs is increased.
BPollination involves the transfer of pollen grains from 'Q' to 'P'.
CFunction of 'S' is to receive the pollen grains during pollination.
D'R' is usually brightly coloured and helps in pollination.

Which of the following are non communicable diseases?

A Measles, Cholera
B Goitre, Anaemia
C Typhoid, Jaundice
D Malaria, Ringworm

Four substances were tested for their electrical conductivity. The results are shown in the table. Study the table and answer the following questions.

In substance Q, bulb lights up but no substance is found either at cathode or at anode, why?

A Because Q is non-electrolyte.
B Because Q is an element which remains unchanged when it conducts electricity.
C Because Q is an electrolyte that conducts electricity when it is in the molten state.
D Because Q is a poor conductor of electricity.

Which of the following statements is/are correct?
I. A bar magnet becomes weak if broke along its length.
II. If a bar magnet is broken into two pieces, total number of north pole becomes 4.
III. Magnetism is induced in iron nail placed near magnet.
IV. Magnetic effect cannot pass through non-magnetic substance.

AII and IV only
BI only
CI, III and IV only
DI, II, III and IV

Match column I with column II and select the correct option from the given codes.

Study the given figure carefully and select the incorrect statements.

I. X is Ca(OH)₂ which forms CaCO₃ with the gas evolved in test tube 1.
II. CaCO₃ is completely soluble in water and forms a clear solution.
III. Gas evolved in test tube 1 will extinguish the candle flame.
IV. X is NaHCO₃ solution which turns milky with the gas evolved in test tube 1.

A II and IV only
B I and II only
C I and III only
D None of these