Science and Technology

Which of the following signals can be coded?

(i) Analogue

(ii) Baseband

(iii) Digital

(iv) Broadband

Which of the following is correct about sex determination of embryo?

(i) Embryo will develop into a male because of X chromosome.

(ii) Embryo will develop into a male because of Y-chromosome.

(iii) Gender cannot be determined on the basis of X chromosome.

(iv) Embryo will develop into a female because of Y-chromosome.

Which of the following pairs is correct?

(i) a-iii, b-i, c-ii

(ii) a-ii, b-iii, c-i

(iii) a-ii, b-i, c-iii

(iv) a-iii, b-ii, c-i

If a stone is dropped from the top of the tower having height 22.05 m, how long does it take to reach the ground?

(i) 1 second

(ii) 1.5 second

(iii) 2 second

(iv) 2.1 second

$W_1$, $W_2$ and $W_3$ are the weights of an object on weighing by a spring balance in air, water and oil respectively. What is the correct ascending order of given weights?

(i) $W_2 <$W_3$<$W_1$

(ii) $W_1 <$W_2$<$W_3$

(iii) $W_3 <$W_2$<$W_1$

(iv) $W_2 <$W_1$<$W_3$

Which of the following is the characteristics of the image of the object kept in front of the convex lens as shown in the figure.

(i) The image is virtual, and magnified

(ii) The image is virtual, inverted and diminished

(iii) The image is real, inverted and diminished

(iv) The image is real and magnified

Which of the following is the source of Alternating current?

(i) dry cell

(ii) solar panel

(iii) dynamo

(iv) voltaic cell

Which of the following is correct about saturated hydrocarbon?

(i) Four bonds between carbon - carbon and general formula $C_nH_{2n+2}$

(ii) carbon - carbon has double or triple bond and general formula $C_nH_{2n}$

(iii) carbon - carbon has single bond and general formula $C_nH_{2n+2}$

(iv) carbon - carbon has single and double bond and general formula $C_nH_{2n-2}$

Which of the following is soap less soap?

(i) Sodium chloride

(ii) Alkyl benzene sulphonate

(iii) Sodium palmitate

(iv) Sodium sulphate

Which of the following is a natural food preservative?

(i) Mixing Sodium benzoate

(ii) Mixing potassium sorbate

(iii) Mixing benzoic acid

(iv) Mixing with oil