Description : Organ systems which are exposed to external environment are protected from bacteria by presence of ___________. a)mucus membrane b)HCl c)hairs d)plug
Last Answer : a)mucus membrane
Description : Red rot of sugarcane is caused by which microorganism? a) bacteria b)virus c)fungus d)none
Last Answer : c)fungus
Description : Foot and Mouth is a disease caused in cattle by __________. a) bacteria b)virus c)fungi d)none
Last Answer : b)virus
Description : ______ helps in fixation of nitrogen in rice field in association with root of Cycas plant. a) rhizobium b)fungus c)cyano bacteria d)bacteria
Last Answer : c)cyano bacteria
Description : _______ is suspension of dead or weakened microbes. a) vaccine b)antibodies c)antibiotics d)bacteria
Last Answer : a) vaccine
Description : ______ is microorganism that can be crystallized and kept in jar for many days. a) bacteria b)fungi c)virus d)protozoa
Last Answer : c)virus
Description : The ________ disease can be prevented by maintaining good personal hygiene. a) cholera b)tuberculosis c)ringworm d)malaria
Last Answer : c)ringworm
Description : Ability to eat away germ is speciality of ________. a)red blood cell b)white blood cell c)liver d)plasma
Last Answer : b)white blood cell
Description : The electrolyte in a lead-acid battery is a) H2SO4 b) HNO3 c) HCl d) NaCl Ans. a
Last Answer : ans a
Description : Which of the given food is preserved by drying method? a) milk b)papaya c)jam d)jelly
Last Answer : b)papaya
Description : Hyperthermophiles are micro organism which live at ____________. a) temperatures between 80^o-122^0 c)cold desert b) very low temperatures d)salt water lake
Last Answer : a) temperatures between 80^o-122^0
Description : Typhoid spreads through _________. a) contaminated water b)air c)animal d)insects
Last Answer : a) contaminated water
Description : Baker’s yeast produce gas which helps in rising of dough is ____________. a) oxygen b)hydrogen c)carbon dioxide d)nitrogen
Last Answer : c)carbon dioxide
Description : Deadly disease which is caused by parasitic microorganism called plasmodium is ______. a) malaria b)dengue c)polio d)rubella
Last Answer : a) malaria
Description : Unicellular microscopic fungi is _________ a) yeast b)mould c)toadstool d)penicillium
Last Answer : a) yeast
Description : _________ is pressurised heating for a short time. a) pasteurisation b)drying c)vacuum packing d)canning
Last Answer : a) pasteurisation
Description : _____ is the natural ability of an organism to have an inbuilt mechanism to resist and destroy the infection. a) antibiotic b)immunity c)antibodies d)none
Last Answer : b)immunity
Description : ______ is chemical produced by fungus which inhibit the growth of other harmful microorganisms. a) antibiotic b)antibodies c)vaccine d)immunity
Last Answer : a) antibiotic
Description : Which among the following is used as a catalyst in the production of high octane fuels? (1) HNO3 (2) H2SO4 (3) HCl (4) HF
Last Answer : (2) H2SO4 Explanation: Sulfuric acid is used as a catalyst for refining and for producing alkylate, an essential component of highoctane fuel. The hydrocarbon molecules are reformed into more complex molecules with a higher octane rating value.
Description : Aquaregia is a mixture of the following in the ratio 1 : 3 by volume– (1) cone. HNO3 and cone. HCL (2) conc. HNO3 and conc. H2SO4 (3) dil. HCl and dil. HNO3 (4) cone. HCl and cone. HNO3
Last Answer : (3) dil. HCl and dil. HNO3 Explanation: Aqua regia or nitro-hydrochloric acid is a highly corrosive mixture of acids which is formed by freshly mixing concentrated Nitric acid (HNO3) and Hydrochloric acid (HCl), optimally in a volume ratio of 1:3. It is used in dissolving gold.
Description : For the COD test of sewage, organic matter is oxidised by K2Cr2O7 in the presence of A. H2SO4 B. HNO3 C. HCl D. None of these
Last Answer : ANS: A
Description : Glass lined vessels are not used for handling/storing (A) Dilute H2SO4 (B) Dilute HNO3 (C) Dilute HCl (D) Hydrofluoric acid
Last Answer : (D) Hydrofluoric acid
Description : 2 ml each of concentrated HCl, HNO3 and a mixture of concentrated hydrochloric acid and Concentrated nitric acid in the ratio of 3:1were taken in test tubes labelled as A, B and C, A small piece of metal was put in ... the metal dissolved in test tube C. The metal could be: A) Al B) Au C) Pt D) Cu
Last Answer : B) Au
Description : For conduct of forced degradation studies under acidic conditions, which of the following substance is used? A. HCl B. H2SO4 C. HNO3 D. Citric acid
Last Answer : A. HCl
Description : Aquaregia is a mixture of the following in the ratio 1 : 3 by volume (1) conc. HNO3 and conc. HCl (2) conc. HNO3 and conc. H2 SO4 (3) dil. HCl and dil. HNO3 (4) conc. HCl and conc. HNO3
Last Answer : dil. HCl and dil. HNO3
Description : Which among the following is used as a catalyst in the production of high octane fuels? (1) HNO3 (2)H2 SO4 (3) HCl (4) HF
Last Answer : H2 SO4
Description : 22. \( H _{2} O \) can act either as an acid or base. Which of the following reaction best illustrate the behaviour of water as a base?(a) \( H _{2} O + NH _{3} \rightarrow OH ^{+}+ NH _{4}^{-} \)(b) \( H _{ ... O \rightarrow H _{3} O ^{+}+ Cl ^{-} \)(d) \( HCl + NaOH \rightarrow NaCl + H _{2} O \)
Last Answer : 22. \( H _{2} O \) can act either as an acid or base. Which of the following reaction best illustrate ... HCl + NaOH \rightarrow NaCl + H _{2} O \)
Description : NaOH + HCl = What is the reaction of NaCl + H2O ?
Last Answer : mitigation reaction.
Description : Consider the following set of reactions : `CHCl_(2)COOH+NaOHrarrCHCl_(2)COONa+H_(2)O " " Delta H_(1) = - 12830` Cal. `HCl + NaOH rarr NaCl + H_(2)O "
Last Answer : Consider the following set of reactions : `CHCl_(2)COOH+NaOHrarrCHCl_(2)COONa+H_(2)O " " Delta H_(1) = - 12830 ... H^(+) + OH^(-)` is `-13680`Cal.
Description : The change in the enthalpy of `NaOH+HCl rarr NaCl+H_(2)O` is called :
Last Answer : The change in the enthalpy of `NaOH+HCl rarr NaCl+H_(2)O` is called : A. Heat of ... of reaction C. Heat of hydration D. Heat of solution
Description : What mass of NaCl would be decomposed by 98 g of `H_(2)SO_(4)` if 120 g of `NaHSO_(4)` and 27 .5 g of HCl are produced in a reaction. Assuming that la
Last Answer : What mass of NaCl would be decomposed by 98 g of `H_(2)SO_(4)` if 120 g of `NaHSO_(4)` and 27 .5 g of HCl ... .95 g B. 49 .5 g C. 0. 495 g D. 495 h
Description : concentrated sulphuric acid on reaction with NaCl, NaBr and Nal produces HCl, bromine and iodine respectively. What order of oxidising ability of halo
Last Answer : concentrated sulphuric acid on reaction with NaCl, NaBr and Nal produces HCl, bromine and iodine respectively. What ... gt l_(2) gt H_(2)SO_(4)`
Description : Artificial transformation in laboratory is carried out by treating the cells with a. MgCl2 b. Cacl2 c. NaCl d. HCl
Last Answer : Ans: B
Description : Why solid NaCl starts separating out from a saturated solution of NaCl if HCl gas is passed through it?
Last Answer : Ans. HCl in the solution provides Clions. This increases the ionic product in NaCl and so the solid NaCl starts separating out.
Description : What happens HCl gas passed through saturated NaCl solution?
Last Answer : Ans. NaCl will be precipitated out.
Description : The formula of common salt is (A) CaOH (B) KOH (C) NaCl (D) HCl
Last Answer : (C) NaCl
Description : NaHCO 3 + HCl NaCl + H 2 O +CO 2 is the correct chemical reaction happening inside stomach when child takes antacid. (a) Yes (b) No (c) May be
Last Answer : (a) Yes
Description : Which of the following reagents will convert acetic acid into acetyl chloride? (a) NaCl (b) HCl/ZnCl2 (c) SOCl2 (d) HCl
Last Answer : SOCl2
Description : Which of the following reagents cannot be used to prepare an alkyl chloride from an alcohol? (a) HCl + ZnCl2 (b) SOCl2 (c) NaCl (d) PCl5
Last Answer : NaCl
Description : Which of the following pairs of compounds could NOT be used to create a buffer solution? Would it be: w) HCL and NaCl (read: H - C - L and N - A - C - L) x) HCN and NaCN (read: H - C - N and N - A - C - N) y) NH3 ... - H - 4 - C - L) z) HNO2 and NaNO2 (read: H - N - O -2 and N - A - N - O - 2)
Last Answer : ANSWER: W -- HCL AND NaCl (read: H - C - L and N - A - C - L)
Description : Refrigerators keep food unspoiled because – (1) at its low temperature, bacteria and moulds are inactive (2) at its low temperature, the germs are killed (3) at its low temperature, the germs are frozen (4) it sterilizes the food
Last Answer : (1) at its low temperature, bacteria and moulds are inactive Explanation: Bacteria and moulds find conditions of low pH, moisture, or temperature and high salt or sugar unfavorable for their ... a long time. Bacterial action is severely impaired at temperatures at or below 4 degree Celsius.
Description : Refrigerators keep food unspoiled because (1) at its low temperature, bacteria and moulds are inactive (2) at its low temperature, the germs are killed (3) at its low temperature, the germs are frozen (4) it sterilises the food
Last Answer : at its low temperature, bacteria and moulds are inactive
Description : Infective bacteria in water is killed by the __________ process. (A) Sterilisation (B) Aeration (C) Disinfection (D) None of these
Last Answer : (A) Sterilisation
Description : Passive immunity can be produced by administration of (A) Pure antigens (B) Immunoglobulins (C) Toxoids (D) Killed bacteria or viruses
Last Answer : Answer : B
Description : Active immunity can be produced by administration of (A) Killed bacteria or viruses (B) Live attenuated bacteria or viruses (C) Toxoids (D) All of these
Last Answer : Answer : D
Description : Clavulanic acid is combined with amoxicillin because (a) It kills bacteria that are not killed by-moxicillin (b) It reduces renal clearance of amoxicillin (c) It counteracts the adverse effects of amoxicillin (d) It inhibits beta lactamases that destroy amoxicillin
Last Answer : Ans: D
Description : Match each disease with its correct type of vaccine. Column I Column II A. Tuberculosis (i) Harmless virus B. Whooping cough (ii) Inactivated toxin C. Diphtheria (iii)Killed bacteria D. Polio (iv) Harmless bacteria (a) A-(iv), B-(iii), C- ... B-(i), C-(iii), D-(iv) (d) A-(iii), B-(ii), C-(iv), D-(i)
Last Answer : a) A-(iv), B-(iii), C-(ii), D-(i)
Description : An attenuated vaccine contains a. Inactive toxins. b. Living, but slow growing (replicating) antigens. c. Killed bacteria. d. Noninfective antigen subunits.
Last Answer : b. Living, but slow growing (replicating) antigens.
Description : Prophylaxis antibiotic for anthrax is given to people with symptoms who have been in a defined hot zone for a period of a) 60 days. Those with symptoms who have been in the hot zone should ... . Those with symptoms who have been in the hot zone should be given 60 days of prophylactic antibiotic
Last Answer : a) 60 days. Those with symptoms who have been in the hot zone should be given 60 days of prophylactic antibiotic. The aim of prophylaxis is to assure that if spores were ... of mediastinal lymph node involvement should be treated with intravenous antibiotics and respiratory support, if needed.
Description : Clavulanic acid is combined with amoxicillin because: A. It kills bacteria that are not killed by amoxicillin B. It retards renal excretion of amoxicillin C. It counteracts the adverse effects of amoxicillin D. It inhibits beta lactamases that destroy amoxicillin
Last Answer : D. It inhibits beta lactamases that destroy amoxicillin