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A block of mass 10 kg, moving in x direction with a constant speed of 10 ms−¹ is subjected to a retarding force F = 0.1x J/m during its travel from x = 20 m to 30 m. Its final KE will be

Two spherical bodies of mass M and 5 M and radii R and 2 R are released in free space with initial separation between their centres equal to 12 R. If they attract each other due to gravitational force only, then the distance covered by the smaller body before collision is

The two ends of a metal rod maintained at temperatures 100 °C and 110 °C. The rate of heat flow in the rod is found to be 4.0 J/s. If the ends are maintained at temperatures 200 °C and 210 °C, the rate of heat flow will be

A Carnot engine having an efficiency of 1 η= 1/10 as heat engine is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is

The fundamental frequency of a closed organ pipe of length 20 cm is equal to the second overtone of an organ pipe open at both the ends. The length of organ pipe open at both ends is

A potentiometer wire has length 4 m and resistance 8 Ω. The resistance that must be connected in series with the wire and an accumulator of emf 2 V, so as to get a potential gradient 1 mV per cm on the wire is

Across a metallic conductor of non-uniform cross section a constant potential difference is applied. The quantity which remains constant along the conductor is

Two identical thin plano–convex glass lenses (refractive index 1.5) each having radius of curvature of 20 cm are placed with their convex surfaces in contact at the centre. The intervening space is filled with oil of refractive index 1.7. The focal length of the combination is

In a double slit experiment, the two slits are 1 mm apart and the screen is placed 1 m away. A monochromatic light of wavelength 500 nm is used. What will be the width of each slit for obtaining ten maxima of double slit within the central maxima of single slit pattern?

The refracting angle of a prism is A, and refractive index of the material of the prism is cot (A/2). The angle of minimum deviation is

‘’Metals are usually not found as nitrates in their ores’’. Out of the following two (a and b) reasons which is/are true for the above observation?
(a) Metal nitrates are highly unstable
(b) Metal nitrates are highly soluble in water

Solubility of the alkaline earth’s metal sulphates in water decreases in the sequence :

Because of lanthanoid contraction, which of the following pairs of elements have nearly same atomic radii? (Numbers in the parenthesis are atomic numbers).

Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds, but not by the other?

A mixture of gases contains H₂ and O₂ gases in the ratio of 1:4 (w/w). What is the molar ratio of the two gases in the mixture?

A given metal crystallizes out with a cubic structure having edge length of 361 pm. If there are four metal atoms in one unit cell, what is the radius of one atom?

When initial concentration of a reactant is doubled in a reaction, its half – life period is not affected. The order of the reaction is :

If the value of an equilibrium constant for a particular reaction is 1.6 × 10¹², then at equilibrium the system will contain

A device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as :

The boiling point of 0.2 mol kg−¹ solution of X in water is greater than equimolal solution of Y in water. Which one of the following statements is true in this case?

The number of d-electrons in Fe²+ (Z = 26) is not equal to the number of electrons in which one of the following?

Which property of colloidal solution is independent of charge on the colloidal particles?

Which of the following statements is correct for a reversible process in a state of equilibrium?

Bithional is generally added to the soaps as an additive to function as a/an:

The electrolytic reduction of nitrobenzene in strongly acidic medium produces:

In Duma’s method for estimation of nitrogen 0.25 g of an organic compound gave 40 mL if nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension at 300 K is 25 mm, the percentage of nitrogen in the compound is:

Biodegradable polymer which can be produced from glycine and aminocaproic acid is

An organic compound ‘X’ having molecular formula C₅H₁₀O yields phenyl hydrazone and gives negative response to the lodoform test and Tollens’ test. It produces npentane on reduction. ‘X’ could be:

Read the following five statements (A to E) and select the option with all correct statements:
(A)Mosses and Lichens are the first organisms to colonise a bare rock
(B) Selaginella is a homosporous pteridophyte.
(C) Coralloid roots in Cycas have VAM
(D)Main plant body in bryophytes is gametophytic, whereas in pteridophytes is
sporophytic
(E)In gymnosperms, male and female gametophytes are present within sporangia
located on sporophyte.

In which of the following gametophyte is not independent free living

Which one of the following statements is wrong?

The guts of cow and buffalo possess

Male gametes are flagellated in

Vascular bundles in monocotyledons are considered closed because

A major characteristic of the monocot root is the presence of

Keel is the characteristic feature of flower of

Perigynous flowers are found in

Leaves become modified into spins in

The structures that are formed by stacking of organised flattened membranous sacs in the chloroplasts are

The chromosomes in which centromere is situated close to one end are

Select the correct matching in the following pairs

True nucleus is absent in

Which one of the following is not an inclusion body found in prokaryotes?

Transpiration and root pressure cause water to rise in plants by

Minerals known to be required in large amounts for plant growth include

What causes a green plant exposed to the light on only one side to bend toward the source of light as it grows?

In a ring girdled plant

Typical growth curve in plants is

Which one gives the most valid and recent explanation for stomatal movements?

The hilum is a scar on the

Which one of the following may require pollinators, but is genetically similar to autogamy?

Which one of the following statement is not true?

Transmission tissue is characteristics feature of

In ginger vegetative propagation occurs through

Which of the following are the important floral rewards to the animal pollinators?

How many pairs of contrasting characters in pea plants were studies by Mendel in his experiments?

Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism?

A technique of micropropagation is

The movement of a gene from one linkage group to another is called

Multiple alleles are present