List of practice Questions

A coil of inductive reactance $\frac{1}{\sqrt{3}} \Omega$ and a resistance 1 $\Omega$ are connected in series to a 200 V, 50 Hz ac source. The time lag between voltage and current is
If 2 moles of an ideal monoatomic gas at a temperature of 27 °C is mixed with 4 moles of another ideal monoatomic gas at a temperature of 327 °C, then the temperature of the mixture of the two gases is
If the far point of a short sighted person is 400 cm, then the power of the lens required to enable him to see very distant objects clearly is
248 g of ethylene glycol (C\(_2\)H\(_6\)O\(_2\)) is added to 200 g of water to prepare antifreeze. What is the molality of the resultant solution?
Kaolinite, a form of clay is the ore of metal X and malachite is the ore of metal Y. X and Y respectively are:
In which polymer preparation, Ziegler–Natta catalyst is used?
The improper functioning of 'X' results in Addison's disease. Hormone 'Y' is responsible for the development of secondary female characteristics. 'X' and 'Y' are respectively:
The speed of a stationary wave represented by the equation $y = 0.75 \sin\left(\dfrac{7\pi}{4}x\right)\cos(350\pi t)$ is
What are X and Y respectively, in the given set of reactions?
CH3CH2CH2Cl
Identify the set containing isoelectronic species.
The percentage of ionization of \( 1 \, \text{L} \) of \( x \, \text{M} \) acetic acid is \( 4.242\% \) and is called solution "A". The percentage of ionization of \( 1 \, \text{L} \) of \( y \, \text{M} \) acetic acid is \( 3\% \) and is called solution "B". Solution "A" is mixed with solution "B". What is the concentration of acetic acid in the resultant solution? (\( K_a \) of acetic acid = \( 1.8 \times 10^{-5} \))
Identify the incorrect statement about the group 13 elements
At \(25 ^\circ\text{C}\), \(K_a\) of formic acid is \(1.8 \times 10^{-4}\). What is the \(K_b\) of \( \text{HCOO}^- \)?
The work done to increase the volume of 2 moles of an ideal gas from \( V \) to \( 2V \) at a constant temperature \( T \) is \( W \). The work to be done to increase the volume of 2 moles of the same gas from \( 2V \) to \( 4V \) at the same constant temperature \( T \) is:
A balloon with mass 'm' is descending vertically with an acceleration 'a' (where a \(<\) g). The mass to be removed from the balloon, so that it starts moving vertically up with an acceleration 'a' is
If current of 80 A is passing through a straight conductor of length 10 m, then the total momentum of electrons in the conductor is (mass of electron \( = 9.1 \times 10^{-31} \) kg and charge of electron \( = 1.6 \times 10^{-19} \) C)
The efficiency of a Carnot's heat engine is \( \frac{1}{3} \). If the temperature of the source is decreased by \(50^\circ \text{C}\) and the temperature of the sink is increased by \(25^\circ \text{C}\), the efficiency of the engine becomes \( \frac{3}{16} \). The initial temperature of the sink is
Among the following fungi, which are placed under class Deuteromycetes?
(Alternaria, Aspergillus, Mucor, Claviceps, Penicillium, Trichoderma, Colletotrichum, Ustilago, Polyporus, Puccinia, Agaricus, Neurospora, Albugo, and Rhizopus)

Match the following:
 

List IDescriptionList IIDescription
AGlycosidic bondIFormed by dehydration
BHollow woollen ball foldingIIITertiary structure of protein
CEnzymeIITrypsin
DEster bondIVBond between phosphate and 5th carbon of sugar
Which of the following is not a biosafety concern for GM crops?

Match the parasites with their infective stages in humans:
 

ParasitesInfective stage
A) Entamoeba histolyticaI) Tetranucleate cyst
B) Plasmodium vivaxII) Sporozoite
C) Ascaris lumbricoidesIII) 2nd stage Rhabditiform larva
D) Wuchereria bancroftiIV) 3rd stage Microfilaria
Statement I: First pair of wings in cockroach help in flight and are called tegmina.
Statement II: In cockroach, arolia help in locomotion on smooth surfaces; plantulae help on rough surfaces.
The circuit consisting of NAND gates that is equivalent to an AND gate is:
Choose the correct statements among the following
I. The longest cells are nerve cells.
II. Smaller DNA in the bacteria called genetic material.
III. Bacterial flagellum has filament, hook and basal body.
IV. In Bacteria, flagella are used to attach to the rock.
Action of restriction enzyme leads to the formation of sticky ends in both vector DNA and Foreign DNA because of
I. Recognise palindromic nucleotide sequence.
II. Cut the strand of DNA a little away from the centre of palindrome site.
III. Help to form complementary cut counter parts.