Which of the following processes are spontaneous and which are non-spontaneous ?
(i) Flow of air from high pressure to low pressure.
(ii) Formation of ice in a refrigerator.
(iii) Spreading of a drop of ink in water kept in a beaker.
(iv) Reverse osmosis.
(v) Burning of coal in air.
(vi) Dissolution of Cu in `ZnSO_4` solution.

Under which of the following sets of conditions is a real gas expected to deviate from ideal behaviour? (I) High pressure, small volume (II) High temperature , low pressure (III) Low temperature, high pressure

Which of the following sequenes is correct to intite inspiration ? (i) the contraction of external intercostal muscles raises the ribs and sternum (ii) Volume of thorax increases in the dorso-ventral axis (iii) intrapulmonary pressure decreases (iv) Diaphragm contraction (v) Air rushes into lungs (vi) Volume of thorax increases in the anterior-posterior axis

Which of the following is true/false regarding transport of substances in plants ? (i) Mass flow is the movement of substances in bulk as a result of pressure difference (ii) Bulk flow is achieved only through a positive hydrostatic pressure gradient (iii) The apoplast system is the system of interconnected protoplasts (iv) Most of the water flow in the roots occurs via the apoplast since the cortical cells are loosely packed, and offer no resistance to water movement.

Which of the following statements is/are not correct for single cell protein (SCP)? (i) The biomass is obtained from unicellular microorganisms only. (ii) It provides a protein rich supplement. (iii) They can be grown easily on materials like waste water from potato processing plants, straw, manure, sewage, etc. (iv) It helps to minimise environmental pollution. (v) SCP has to be processed before use.

Consider the following four statements (I - iv) and select the correct option stating which ones are true (T) and which ones are false (F). (i) Formation of oxyhaemoglobin occurs on alveolar surface. (ii) During gaseous exchange the gases diffuse from high partial pressure to low partial pressure. (iii) Carbon dioxide cannot be transported with haemoglobin. (iv) Earthworm respires through parapodia.

Name the process associated with the following (a) Dry ice is kept at room temperature and at one atmospheric pressure. (b) A drop of ink placed on the surface of water contained in a glass spreads throughout the water. (c) A potassium permanganate crystal is in a beaker and water is poured into the beaker with stirring. (d) An acetone bottle is left open and the bottle becomes empty. (e) Milk is churned to separate cream from it. (f) Settling of sand when a mixture of sand and water is left undisturbed for some time. (g) Fine beam of light entering through a small hole in a dark room. Illuminates the particles in its paths.

Assign suitable terms to the following : (i) Materials which can withstand very high temperatures without melting and softening. (ii) Sulphide ores are generally heated in a stream of air. (iii) The substances used for the removal of gangue in the ores in the form of slags. (iv) Two metals which are manufactured by the electrolysis of their fused salts. (v) Two metals used for reduction in metallurgical processes.

With its very large population of vehicular traffic, Delhi is one of the most polluted cities of the world. Which of the following steps were taken by the government to reduce vehicular pollution in Delhi ? (i) Switching over the entire fleet of public transport i.e., buses, autorickshaws, from diesel to CNG (ii) Phasing out of old vehicles (iii) Use of unleaded petrol in vehicles (iv) Use of low sulphur petrol and diesel in vehicles (v) Use of catalytic converters in vehicles (vi) Application of stringent pollution level norms for vehicles such as Euro-II norms, etc.