List of practice Questions

Sulphuric acid reacts with $PCl_5$ to give

Sugar cane reproduces by

Sulpha drugs are used for

Sulphide ion $(S^{2-})$ reacts with solid sulphur forming $S^{2-}_2$ and $S^{2-}_3$ with formation constants 12 and 132 respectively. Formation constant of $S^{2-}_3$ from sulphur and $S^{2-}_2$ is :

Sulphide ores are generally concentrated by

Study the given pedigree chart for sickle-cell anaemia and select the most appropriate option for the genotypes.

Study the given statements and select the correct answer, (i) Cellulose is a homopolymer of glucose. (ii) Inulin is a homopolymer of fructose. (iii) Starch gives blue colour and glycogen gives red colour with iodine solution. (iv) Cellulose gives no colour with iodine solution.

Study the incorrect statement with respect to an overview of the electron transport system $(ETS)$.

Substances whose solutions can readily diffuse through parchment membrane are

Study the given figure of structure of $TMV$ (Tobacco Mosaic Virus) and select the option that correctly identifies the labellings $A$ and $B$.

Study the given figure showing structure of Euglena and select the option that correctly identifies $A, B, C$ and $D$.

Study the given figures and identify the kind of phyllotaxy.

Study the following statements regarding Bt toxins produced by bacterium Bacillus thuringiensis and select the correct one.

Study the following statements regarding the anatomy of isobilateral leaf. (i) Stomata are equally distributed on both the surfaces. (ii) Certain adaxial epidermal cells are modified into bulliform cells in grasses. (iii) The vascular bundles are radial. (iv) Phloem is adaxially placed. Which of the above statements are correct?

Study the given differences between primary sludge and activated sludge and select the incorrect ones

Study the given figure of reproductive system of male cockroach In which of the labelled parts are the sperms stored?

Study of pollen grains is called

Study the following statements and select the correct ones. (i) Organisms capable to tolerate a wide range of temperature are called stenothermal organisms. (ii) Thermal tolerance of different species determines their geographical distribution to a large extent. (iii) Average temperature in tropical deserts in summer is $< 50^{\circ}C$. (iv) Thermal springs cannot sustain life due to very high average temperature i. e., $> 100^{\circ}C$.

Strobilanthus kunthiana produces flowers once in every

Structure of boric acid is

Study of human evolution is called

Sterilisation techniques are generally fool proof methods of contraception with least side effects. Yet, this is the last option for the couples because (i) it is almost irreversible (ii) of the misconception that it will reduce sexual urge/ drive (iii) it is'a surgical procedure (iv) of lack of sufficient facilities in many parts of the country. Choose the correct option.

Stirrup-shaped bone of the middle ear is

Steel is preferred for making springs over copper, because

Stephen's reduction converts nitriles into