State the colour change in a universal indicator e.g. pH paper on (i) slightly acidic soil (ii) slightly alkaline soil (iii) dairy milk (iv) human blood tested for medical diagonsis

State the colour change in a neutral litmus in presence of (i) acidic (ii) alkaline medium

Mention the colour changes observed when the following indicators are added to acids- (i) Alkaline phenolphathalein solution (ii) Methyl orange solution (iii) Neutral litmus solution

Five solutions A,B,C,D and E when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is (a) neutral? (b) strongly alkaline? (c) strongly acidic? (d) weakly acidic? (e) weakly alkaline? Arrange the pH in increasing order of hydrogen-ion concentration.

The pH values of solutions marked as A, B, C, D and E are 4, 1, 11, 7 and 9 respectively. (i) Arrange these solutions in the decreasing order of pH. (ii) Arrange these solutions in the increasing order of hydrogen ion concentrations. (iii) In the list of the given solutions identify : (a) Neutral solution (b) Highly alkaline solution ( c) Highly acidic solution (d) Moderately acidic solution (e) Moderately basic solution

Let I_(E),I_(C) and I_(B) represent the emitter current, the collector current and the base current respectively in a transistor.then (i) I_(C) is slightly smaller than I_(E) (ii) I_(C) is slightly greater than I_(E) (iii) I_(B) is much smaller than I_(E) (iv) I_(B) is much greater than I_(E)

Read the following statements regarding the various techniques used in cancer detection. (i) Cancer detection is based on biopsy and histopathological studies of the tissue, and blood and bone marrow tests for increased cell counts in case of leukaemia. (ii) In biopsy, a piece of the suspected tissue cut into thin sections is stained and examined under microscope by a pathologist. (iii) Techniques like radiography (use of X-rays), CT (computed tomography) and MRI(magnetic resonance imaging) are very useful to detect cancers of the internal organs. (iv) Computed tomography uses strong magnetic fileds and non-ionising radiations to detect physiological changes in living tissues. (v) MRI uses X-rays and ionising radiation to generate a 3-D image of the internal structure of an object. Which of the above statements are incorrect ?

The given figure represents a single nephron from a mammalian kidney. Identify the labelled parts, match them with the functions (i-iv) and select the correct option. (i). The site of ultrafiltration. (ii). Particularly sensitive to ADH. (iii). The main site for the reabsorption of glucose and amino acids. (iv). Largely responsible for the maintenance of blood pH.

Select the correct set of the statements for an acid type indicator used in a titration : (i) In general, pH range of an indicator is (pK_(a)-1) to (pK_(a)+1) and indicator shows its characteristic colours in this range. (ii) In general pH range of an indicator is (pK_(a)-1) to (pK_(a)-1) and indicator does not show its characteristic colours in this range (iii) In this relation : pH=pK_(In) +log_(10)((["In"^(-)])/(["HIn"])),pH value representes pH of indicator solution. (iv) In this relation : pH=pK_(In) +log_(10)((["In"^(-)])/(["HIn"])),pH value represents pH of resulting solution containing indiactor .

Fragmentation, leaching and catabolism are some of the important steps of decomposition. Study the following statements I , ii and iii regarding these and select the correct option. (i) Detritivores (e.g., earthworm) breakdown detritus into smaller particles. (ii) Water soluble inorganic nutrients go down into soil horizon and get precipitated as unavailable salts. (iii) Decomposers (e.g., bacteria and fungi) secrete digestive enzymes and degrade detritus into simpler inorganic substances.

a. At what pH does indicator change colour if the indicator is a weak acid with K_(Ind) = 4.0 xx 10^(-4) . b. For which of the following neutralisation would the indicator be useful? i. HCl +NaOH ii. CH_(3)COOH +NaOH iii. HCl +NH_(3) c. Name the indicators which can be used for such titration.