List of practice Questions

$Na_{2}O$ is basic oxide whereas $Cl_{2}O_{7}$ is acidic oxide. Elements on extreme left form basic oxides whereas elements on extreme right form acidic oxides.

Nephrons are of two types : cortical and juxtamedullary according to their relative position in the cortex Juxtamedullary nephrons have short loop of Henle while cortical nephrons have long loop of Henle

Myelinated nerve fibres are present in spinal and cranial nerves Myelinated nerves conduct impulses more rapidly than unmyelinated nerves

n: The stage between the two meiotic divisions is called interkinesis. : Interkinesis is generally short lived.

Moon has no atmosphere. The escape velocity for moon is less than that for earth.

Mycoplasmas are pathogenic in animals and plants. Mycopiasmas lack cell wall and can survive without oxygen.

Monoadelphous stamens are found in pea. In pea, stamens are united into one bunch or one bundle.

Metabolism refers to the sum of chemical reactions that occur within living organisms. Metabolic reactions occur simultaneously inside living organisms.

Mitochondria are called 'power houses' of the cell Mitochondria produce cellular energy in the form of $ATP$

Mass or bulk flow is the movement of substances in bulk from source to sink as a result of pressure differences. Water, minerals and food are generally moved by mass flow.

Melatonin influences the menstrual cycle, pigmentation and defense capability. Melatonin plays an important role in the regulation of diurnal rhythm of our body.

Lyophilic colloids have a unique property of protecting lyophobic colloids. Lyophilic colloids are extensively solvated.

Magnetic lines of force form continuous closed loops Magnetic poles always occur in pairs as north pole and south pole

Magnetic field due to current carrying solenoid is independent of its length and cross-sectional area The magnetic field inside the solenoid is uniform

Lithium salts are mostly hydrated. The hydration enthalpies of alkali metal ions decrease with increase in ionic sizes.

Leaves of Bryophyllum, Begonia help in vegetative multiplication. Leaves of these plants possess adventitious buds.

Leucoplasts perform photosynthesis Chloroplasts store fats, starch and proteins

Karyokinesis follows cytokinesis. : Karyokinesis is the division of cytoplasm into two daughter cells.

Keys are analytical in nature. Keys are based on couplet.

Isogametes are formed in majority of sexually reproducing organisms. Morphologically distinct type of gametes are called isogametes.

$K_4[Fe(CN)_6]$ is diamagnetic and $[Fe(H_2O)_6 ]Cl_3$ is paramagnetic. Hybridisation of central metal m $K_4[Fe(CN)_6] is \,sp^3d^2,$ while in $[Fe(H_2O)_6]Cl_3\, is\, d^2\, sp^3$

Isocyanide test can be used to distinguish between secondary and tertiary amines. Tertiary amines on heating with chloroform and ale. $KOH$ form foul smelling substances.

Ions are absorbed from the soil by active transport only. The proteins present in the membranes of root hair cells passively pump ions from the soil into the cytoplasm of the epidermal cells.

: Interference is not observed if the two coherent slit sources are broad. : A broad source is equivalent to many narrow slit sources.

Inspiration occurs when there is a negative pressure in the lungs with respect to the atmospheric pressure. During inspiration, a decrease in pulmonary volume increases the intra-pulmonary pressure than atmospheric pressure which forces the air from outside to move into the lungs.