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Reyana09
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Answer to: ______ is the toxin released by the rupture of RBCs into the blood in a malaria- infected person.

Hemocoin.

4 years ago
Forum
Human Health and Disease
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Answer to: Plasmodium enters the human body as ______ .

Sporozoite.

4 years ago
Forum
Human Health and Disease
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Answer to: Hydrogen peroxide in its reaction with KIO4 and NH2OH respectively is acting as a

Correct answer: (a) Reducing agent, oxidising agent Explanation: KIO4 + H2O2 → KIO3 + H2O + O2 Thus H2O2 is acting as a reducing agent 2NH2OH ...

4 years ago
Forum
Hydrogen
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Answer to: 30 volume hydrogen peroxide means (a) 30% of H2O2 solution (b) 30 cm3 solution contains 1g of H2O2

Correct answer: (b) 30 cm3 solution contains 1g of H2O2 Explanation: 30 vol of H2O2 means one volume of H2O2 on decomposition will give 30 volume ...

4 years ago
Forum
Hydrogen
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Answer to: Saline hydrides react explosively with water, such fires can be extinguished by

Correct answer: (c) sand Explanation: Fire due to action of water on saline hydrides cannot be extinguished with water or CO2. These hydrides can ...

4 years ago
Forum
Hydrogen
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Answer to: When zeolite (hydrated sodium aluminium silicate) is treated with hard water, the sodium ions are exchanged with

Correct answer: (b) Ca2+ ions Explanation: Na zeolite + CaCl2 → Ca zeolite + 2NaCl

4 years ago
Forum
Hydrogen
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Answer to: Which substance does not speed up decomposition of H2O2?

Correct answer: (a) Glycerol Explanation: Glycerol, phosphoric acid or acetanilide is added to H2O2 to check its decomposition.

4 years ago
Forum
Hydrogen
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Answer to: The reaction of H2O2 with sulphur is an example of ........ reaction (a) Addition (b) Oxidation (c) Reduction (d) Redox

Correct answer: (d) Redox Explanation: H2S + H2O2 → 2H2O + S H2S → S (Oxidation) H2O2 → 2H2O (Reduction) In this reaction H2S is oxidised to...

4 years ago
Forum
Hydrogen
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Answer to: An inorganic compound gives off O2 when heated, turns an acidic solution of KI violet and reduces acidified KMnO4. The compound is

Correct answer: (c) H2O2 Explanation: 2H2O2 + heat → 2H2O + O2 2KI + H2O2 → 2KOH + I2 2KMnO4 + 3H2SO4 + 5H2O2 → K2SO4 + 2MnSO4 + 8H2O + 5O2

4 years ago
Forum
Hydrogen
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Answer to: Pick out the correct statement (a) By decreasing the temperature pure parahydrogen can be obtained (b) By increasing the temperature pure orthohydrogen can be obtained

Correct answer: (a) By decreasing the temperature pure parahydrogen can be obtained Explanation: Pure para form can be obtained at low temperature...

4 years ago
Forum
Hydrogen
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Answer to: Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases H2O2 act as a reducing agent in acid medium?

Correct answer: (a) MnO4- Explanation: H2O2 acts as a reducing agent only in presence of strong oxidising agents (i.e., MnO4-) in acidic as well a...

4 years ago
Forum
Hydrogen
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Answer to: Which statement is wrong? (a) Ordinary hydrogen is an equilibrium mixture of ortho and para hydrogen (b) In ortho hydrogen spin of two nuclei is in same direction

Correct answer: (a) H2O2 Explanation: K2Cr2O7 an orange coloured solution, on acidification with dil H2SO4 is oxidised by H2O2 to blue peroxide of...

4 years ago
Forum
Hydrogen
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Answer to: ______ test is performed to confirm typhoid.

Widal test is performed to confirm typhoid.

4 years ago
Forum
Human Health and Disease
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Answer to: Among non-infectious diseases, ______ is the major cause of death.

Among non-infectious diseases, Cancer is the major cause of death.

4 years ago
Forum
Human Health and Disease
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Answer to: Cell-mediated immunity is provided by ______ .

Cell-mediated immunity is provided by T-cells.

4 years ago
Forum
Human Health and Disease
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Answer to: ______ barriers protect the non-infected cells from further viral infections.

Cytokine barriers protect the non-infected cells from further viral infections.

4 years ago
Forum
Human Health and Disease
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Answer to: ______ mosquitoes are the vectors of dengue and chikungunya.

Aedes mosquitoes are the vectors of dengue and chikungunya.

4 years ago
Forum
Human Health and Disease
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Answer to: Transplantation of tissues/organs to save certain patients often fails due to rejection of such tissues/organs by the patient. Which type of immune response is responsible for such rejections?

Correct answer: (d) cell-mediated immune response

4 years ago
Forum
Human Health and Disease
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Answer to: Many diseases can be diagnosed by observing the symptoms in the patient. Which group of symptoms are indicative of pneumonia?

Correct answer: (a) Difficulty in respiration, fever, chills, cough, headache

4 years ago
Forum
Human Health and Disease
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Answer to: The substance produced by a cell on viral infection that can protect other cells from further infection is

Correct answer: (c) interferon

4 years ago
Forum
Human Health and Disease
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