List of practice Questions

Monoclinic sulphur is an example of monoclinic crystal system. For a monoclinic system, $a\ne b\ne c$ and $\alpha=\gamma=90^{\circ}, \beta=90^{\circ}$.

Magnetic field interacts with a moving charge and not with a stationary charge. A moving charge produces a magnetic field.

Interspecific competition is the only potent force in organic evolution. Unexceptionally two closely related species competing for the same resources cannot co-exist indefinitely.

In a pivot joint, rounded or pointed bone fits into a shallow depression in another bone. Pivot joints are present between the metacarpals and phalanges of the fingers.

Human heart is myogenic. The contraction is initiated by a specialized patch of modified heart muscles without requiring stimulation from nerve cells.

Conductivity of all electrolytes decreases on dilution. On dilution number of ions per unit volume decreases.

Chloroform is stored in dark coloured bottles. Chronic chloroform exposure may cause damage to liver and kidneys.

$CaF _{2}$ has been given the name fluorspar. Solid $CaF _{2}$ emits light when heated.

Boron always forms covalent bond. The small size of $B ^{3+}$ favours formation of covalent bond.

$Al _{2} O _{3}$ is converted to aluminium by reduction with carbon. Carbon (graphite) has greater affinity for oxygen than $Al$.

An LPG cylinder, containing $15\, kg$ butane at $27^{\circ} C$ and $10\, atm$ pressure, is leaking. After one day, its pressure decreased to 8 atm. The quantity of gas leaked is

In the reaction shown below, the major product(s) formed is/are

According to kinetic theory of gases, molecules of a gas behave like

A triply ionized beryllium ($Be^{+++}$) has the same orbital radius as the ground state of hydrogen. Then the quantum state $n$ of $Be^{3+}$ is

Two ideal batteries of $emf V _{1}$ and $V _{2}$ and three resistances $R _{1}, R _{2}$ and $R _{3}$ are connected as shown in the figure. The current in resistance $R _{2}$ would be zero if

Which one of the following is an example for biodegradable polyester?

Which one of the following is wrongly matched?

Which structures perform the function of mito- chondria in bacteria?

Williamson?? synthesis of preparing dimethyl ether is a/an

Which of the following feature(s) is/are common to both wind and water pollinated flowers? I. Pollen grains are long and ribbon-like II. Stigma is large and feathery III. The flowers are not colourful IV. The flowers do not produce nectar

Which of the following does not apply to ascomycetes?

Magnetic moment 2.83 BM is given by which of the following ions? (At. no. Ti =22, Cr=24, M n=25, N i=28)

IUPAC name of the compound

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from $0.75\, g$ of sample neutralized $10\, mL$ of $ {1 \, M \, H_2SO_4}$. The percentage of nitrogen in the soil is :

In a common emitter transistor amplifier an increase of $50 \,\mu A$ in the base current causes an increase of $1 \,mA$ in the collector current. The change in emitter current is