Surface water is a better source of drinking water because it is poor in - (1) Dust (2) Bacteria (3) Arsenic (4) Algae

Surface water is a better source of drinking water because it is poor in - (1) Dust (2) Bacteria (3) Arsenic (4) Algae
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(3) Arsenic Explanation: Surface water is a better source of drinking water because it is poor in arsenic.
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Surface water is a better source of drinking water because it is poor in (1) Dust (2) Bacteria (3) Arsenic (4) Algae

Description : Surface water is a better source of drinking water because it is poor in (1) Dust (2) Bacteria (3) Arsenic (4) Algae

Last Answer : Arsenic

Which of the following can be found as pollutants in the drinking water in some parts of India? Select the correct answer using the code given below. (A) Arsenic (B) Sorbitol (C) Fluoride (D) Formaldehyde (E) Uranium (1) B, D and E (2) A, B, C, D and E (3) A, C and E (4) A and C

Description : Which of the following can be found as pollutants in the drinking water in some parts of India? Select the correct answer using the code given below. (A) Arsenic (B) Sorbitol (C) Fluoride (D) Formaldehyde (E) Uranium (1) B, D and E (2) A, B, C, D and E (3) A, C and E (4) A and C

Last Answer : A, C and E 

Fluorosis is caused due to the presence of excessive amount of __________ in drinking water. (A) Mercury (B) Lead (C) Fluoride (D) Arsenic

Description : Fluorosis is caused due to the presence of excessive amount of __________ in drinking water. (A) Mercury (B) Lead (C) Fluoride (D) Arsenic

Last Answer : (C) Fluoride

Ice is packed in saw dust because – (1) saw dust will not get melted easily. (2) saw dust is poor conductor of heat. (3) saw dust is a good conductor of heat. (4) saw dust does not stick to the ice.

Description : Ice is packed in saw dust because – (1) saw dust will not get melted easily. (2) saw dust is poor conductor of heat. (3) saw dust is a good conductor of heat. (4) saw dust does not stick to the ice.

Last Answer : (2) saw dust is poor conductor of heat. Explanation: ice needs to absorb heat energy to melt and become water (called latent heat of fusion). Since saw-dust is a poor conductor of heat, it takes ... required heat energy. This allows ice to remain in solid state for more time when packed in saw dust.

Ice is packed in saw dust because (1) saw dust will not get melted easily. (2) saw dust is poor conductor of heat. (3) saw dust is a good conductor of heat. (4) saw dust does not stick to the ice.

Description : Ice is packed in saw dust because (1) saw dust will not get melted easily. (2) saw dust is poor conductor of heat. (3) saw dust is a good conductor of heat. (4) saw dust does not stick to the ice.

Last Answer : saw dust is poor conductor of heat.

Pick out the wrong statement. (A) Geothermal energy is a non-conventional source of energy (B) Mass is converted into energy in both nuclear fission & fusion reaction (C) Inhalation of mercury vapour is not harmful for human beings (D) Inhalation of arsenic causes cancer

Description : Pick out the wrong statement. (A) Geothermal energy is a non-conventional source of energy (B) Mass is converted into energy in both nuclear fission & fusion reaction (C) Inhalation of mercury vapour is not harmful for human beings (D) Inhalation of arsenic causes cancer

Last Answer : (C) Inhalation of mercury vapour is not harmful for human beings

Airmass near to the earth's surface is warmer because it – (1) radiates heat (2) contains dust particles (3) is warmed by terrestrial radiation (4) is far from the sun

Description : Airmass near to the earth's surface is warmer because it – (1) radiates heat (2) contains dust particles (3) is warmed by terrestrial radiation (4) is far from the sun

Last Answer : (3) is warmed by terrestrial radiation Explanation: The air close to the ground is warmer because the earth's surface is what heats the atmosphere, for the most part. Terrestrial radiation accounts for ... Earth's surface. The further away from the earth's surface we go, the cooler the atmosphere.

Airmass near to the earth’s surface is warmer because it (1) radiates heat (2) contains dust particles (3) is warmed by terrestrial radiation (4) is far from the sun

Description : Airmass near to the earth’s surface is warmer because it (1) radiates heat (2) contains dust particles (3) is warmed by terrestrial radiation (4) is far from the sun

Last Answer : is warmed by terrestrial radiation

What is the acceptable level of arsenic in water ?

Description : What is the acceptable level of arsenic in water ?

Last Answer : Acceptable levels of arsenic in water : 0 . 01 Mr. _ Gr . Per Litter.

Which of the following is used for removing air bubbles from glass during its manufacture? (1) Fledspar (2) Arsenic oxide (3) Potassium Carbonate (4) Soda Ash

Description : Which of the following is used for removing air bubbles from glass during its manufacture? (1) Fledspar (2) Arsenic oxide (3) Potassium Carbonate (4) Soda Ash

Last Answer : (2) Arsenic oxide

When Arsenic atoms are added Germanium lattice, it becomes a/an - (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Description : When Arsenic atoms are added Germanium lattice, it becomes a/an - (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Last Answer : (4) Extrinsic semiconductor Explanation: When a peritavalent (donor) impurity, like arsenic, is added to germanium, it will form covalent bonds with thegermanium atoms, leaving 1 electron relatively ... this manner - either with Nor P-type impurities - are referred to as EXTRINSIC semiconductors.

Which of the following is not a donor atom? (1) Phosphorus (2) Antimony (3) Arsenic (4) Aluminium

Description : Which of the following is not a donor atom? (1) Phosphorus (2) Antimony (3) Arsenic (4) Aluminium

Last Answer : (4) Aluminium Explanation: Aluminium is an acceptor atom, an impurity atom in a semiconductor, which can accept or take up one or more electrons from the crystal and become negatively charged. In semiconductor physics. It is a dopant atom that when added to a semiconductor can form a ptype region.

If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by – (1) Mercury (2) Lead (3) Iron (4) Arsenic

Description : If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by – (1) Mercury (2) Lead (3) Iron (4) Arsenic

Last Answer : (2) Lead Explanation: Lead is used in building construction, lead-acid batteries, bullets and shot, weights, as part of solders, pewters, fusible alloys, and as a radiation shield. Lead has the ... Its four stable isotopes have 82 protons, a magic number in the nuclear shell model of atomic nuclei.

An example of semiconductor is - (1) German silver (2) Germanium (3) Phosphorous (4) Arsenic

Description : An example of semiconductor is - (1) German silver (2) Germanium (3) Phosphorous (4) Arsenic

Last Answer : (2) Germanium Explanation: Purified germanium is a semiconductor, with appearance most similar to elemental silicon. Like silicon, germanium naturally reacts and forms complexes with oxygen in nature. Unlike silicon, it is too reactive to be found naturally on Earth in the free (native) state.

Which of the following is not a donor atom? (1) Phosphorus (2) Antimony (3) Arsenic (4) Aluminium

Description : Which of the following is not a donor atom? (1) Phosphorus (2) Antimony (3) Arsenic (4) Aluminium

Last Answer : (4) Aluminium Explanation: Aluminium is an acceptor atom, an impurity atom in a semiconductor, which can accept or take up one or more electrons from the crystal and become negatively charged.

If we add equimolar amounts of ferric hydroxide sol and arsenic sulphide sol, what will happen ?

Description : If we add equimolar amounts of ferric hydroxide sol and arsenic sulphide sol, what will happen ?

Last Answer : Ans. Both the sols will get coagulated. 

What is the only nonmetal element that is a liquid room temperature? w) phosphorus x) bromine y) iodine z) arsenic

Description : What is the only nonmetal element that is a liquid room temperature? w) phosphorus x) bromine y) iodine z) arsenic

Last Answer : ANSWER: X -- BROMINE

Which of the following is not a donor atom? (1) Phosphorus (2) Antimony (3) Arsenic (4) Aluminium

Description : Which of the following is not a donor atom? (1) Phosphorus (2) Antimony (3) Arsenic (4) Aluminium

Last Answer : Aluminium

When Arsenic atoms are added to Germanium lattice, it becomes a/an (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Description : When Arsenic atoms are added to Germanium lattice, it becomes a/an (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Last Answer : Extrinsic semiconductor

An example of semiconductor is (1) German silver (2) Germanium (3) Phosphorous (4) Arsenic

Description : An example of semiconductor is (1) German silver (2) Germanium (3) Phosphorous (4) Arsenic

Last Answer : Germanium

If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by (1) Mercury (2) Lead (3) Iron (4) Arsenic

Description : If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by (1) Mercury (2) Lead (3) Iron (4) Arsenic

Last Answer : Lead

Which cell is found in bluish green algae or bacteria ?

Description : Which cell is found in bluish green algae or bacteria ?

Last Answer : The stem cells are found in bluish green algae or bacteria.

Golgi apparatus is absent in (a) Higher plants (b) Yeast (c) Bacteria and blue-green algae (d) Liver cells

Description : Golgi apparatus is absent in (a) Higher plants (b) Yeast (c) Bacteria and blue-green algae (d) Liver cells

Last Answer : Ans. ((c))

Cyclic phosphorylation is generally present in a. Cyanobacteria b. Algae c. Bacteria d. Plants

Description : Cyclic phosphorylation is generally present in a. Cyanobacteria b. Algae c. Bacteria d. Plants

Last Answer : Ans: A

The following organisms have been proposed as sources of single cell protein a. Bacteria b. Yeasts c. Algae d. All the three

Description : The following organisms have been proposed as sources of single cell protein a. Bacteria b. Yeasts c. Algae d. All the three

Last Answer : Ans: D

Which one of the following groups of organisms is thermophilic in that they can tolerate and grow at fairly high temperatures? (a) Certain bacteria and blue-green algae (b) Loris, rhesus monkey and red kangaroo (c) Llamas, camels and yaks (d) Bison, musk-ox and racoon

Description : Which one of the following groups of organisms is thermophilic in that they can tolerate and grow at fairly high temperatures? (a) Certain bacteria and blue-green algae (b) Loris, rhesus monkey and red kangaroo (c) Llamas, camels and yaks (d) Bison, musk-ox and racoon

Last Answer : Ans:(a)

Lichen is considered to be a symbiotic association of two living organisms. Which organisms are involved in it? (a) Algae and bacteria (b) Algae and fungi (c) Algae and bryophytes (d) Fungi and bryophytes

Description : Lichen is considered to be a symbiotic association of two living organisms. Which organisms are involved in it? (a) Algae and bacteria (b) Algae and fungi (c) Algae and bryophytes (d) Fungi and bryophytes

Last Answer : Ans:(b)

An organism which can monitor air pollution is – (1) Bacteria (2) Lichen (3) Algae (4) Fungi

Description : An organism which can monitor air pollution is – (1) Bacteria (2) Lichen (3) Algae (4) Fungi

Last Answer : (2) Lichen Explanation: Lichens can be used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. Air pollutants dissolved in rainwater, especially sulfur ... lichens, and prevent them from growing. This makes lichens natural indicators of air pollution.

Which of the following is/are examples for symbiotic association? (1) Algae - lichen (2) Plant roots - rhizobium bacteria (3) Both are right (4) Both are wrong

Description : Which of the following is/are examples for symbiotic association? (1) Algae - lichen (2) Plant roots - rhizobium bacteria (3) Both are right (4) Both are wrong

Last Answer : (3) Both are right

The scavengers earth are – (1) Bacteria (2) Viruses (3) Algae (4) Fun

Description : The scavengers earth are – (1) Bacteria (2) Viruses (3) Algae (4) Fun

Last Answer : (3) Algae Explanation: Scavenger is an organism that mostly consumes decaying biomass, such as meat or rotting plant material. Blue-green algae (BGA) inhibit lipid peroxidation and have free radical scavenging.

Yeast is a ______. (1) Bacteria (2) Fungi (3) Algae (4) Bryophyte

Description : Yeast is a ______. (1) Bacteria (2) Fungi (3) Algae (4) Bryophyte

Last Answer : (2) Fungi Explanation: Yeast are eukaryotic, singlecelled microorganisms classified as members of the fungus kingdom. They are estimated to constitute 1% of all described fungal species. Yeasts, such as Candida albicans, are opportunistic pathogens and can cause infections in humans.

Lichen is an association between which of the two? (1) Algae and fungus (2) Algae and tree (3) Fungus and tree (4) Bacteria and legume plant

Description : Lichen is an association between which of the two? (1) Algae and fungus (2) Algae and tree (3) Fungus and tree (4) Bacteria and legume plant

Last Answer : (1) Algae and fungus Explanation: A lichen is an organism that is formed by the symbiotic association of a fungus and an algae or cyanobacterium. It occurs as crusty patches or bushy growths on tree trunks, bare ground, etc. The properties are sometimes plant-like, but lichens are not plants.

Which is used as an Air pollution indicator? (1) Algae (2) Fungi (3) Bacteria (4) Lichens

Description : Which is used as an Air pollution indicator? (1) Algae (2) Fungi (3) Bacteria (4) Lichens

Last Answer : (4) Lichens Explanation: Lichens are used as air pollution indicators, especially of the concentration of sulfur dioxide in the atmosphere. If air is very badly polluted with sulphur dioxide there may be no ... may be found. If the air is clean, shrub-by, hairy and leafy lichens become abundant.

Motoxins are produced by - (1) Bacteria (2) Algae (3) Viruses (4) Fungi

Description : Motoxins are produced by - (1) Bacteria (2) Algae (3) Viruses (4) Fungi

Last Answer : (4) Fungi Explanation: Aflatoxin are naturally occurring mycotoxins that are produced by Aspergillus flavus and Aspergillus parasiticus, species of fungi. They have been associated with various diseases, such as aflatoxicosis, in livestock, domestic animals and humans throughout the world.

Rabies is caused by – (1) bacteria (2) virus (3) fungus (4) algae

Description : Rabies is caused by – (1) bacteria (2) virus (3) fungus (4) algae

Last Answer : (2) virus Explanation: Rabies is a viral disease that causes acute encephalitis in warm-blooded animals. The disease is zoonotic, meaning it can be transmitted from one species to another, such as from dogs to humans, commonly by a bite from an infected animal.

Penicillinis isolated from : (1) Fungi (2) Algae (3) Virus (4) Bacteria

Description : Penicillinis isolated from : (1) Fungi (2) Algae (3) Virus (4) Bacteria

Last Answer : (1) Fungi Explanation: Penicillin is one of the first and still one of the most widely used antibiotic agents - derived from the Penicillium mold (fungi). Penicillin kills bacteria by interfering with the ability to synthesize cell wall.

Which of the following groups of organisms reproduce faster? (1) Algae (2) Fungi (3) Bacteria (4) Protozoa

Description : Which of the following groups of organisms reproduce faster? (1) Algae (2) Fungi (3) Bacteria (4) Protozoa

Last Answer : (3) Bacteria Explanation: Unlike in multicellular organisms, increases in cell size (cell growth and reproduction by cell division) are tightly linked in unicellular organisms. Bacteria grow to a ... divide extremely rapidly, and bacterial populations can double as quickly as every 9.8 minutes.

Of all micro-organisms, the most adaptable and versatile are – (1) Viruses (2) Bacteria (3) Algae (4) Fungi

Description : Of all micro-organisms, the most adaptable and versatile are – (1) Viruses (2) Bacteria (3) Algae (4) Fungi

Last Answer : (1) Viruses Explanation: The viruses are adaptable and versatile with many variations worldwide and they reproduce within the cells of the immune system of infected people. ... versatility an individual has developed to respond to changing interpersonal situations and environmental requirements.

The first photosynthetic oxygen liberating organisms to appear on earth were (1) Cyanobacteria (2) Bryophytes (3) Green algae (4) Bacteria

Description : The first photosynthetic oxygen liberating organisms to appear on earth were (1) Cyanobacteria (2) Bryophytes (3) Green algae (4) Bacteria

Last Answer : (1) Cyanobacteria Explanation: Cyanobacteria or blue green algae were the photosynthetic organisms that lived in the ancient ocean. It liberated the oxygen found in the iron oxide.

Enzymes are absent in – (1) fungi (2) bacteria (3) viruses (4) algae

Description : Enzymes are absent in – (1) fungi (2) bacteria (3) viruses (4) algae

Last Answer : (3) viruses

The micronutrient for bacteria; algae and fungi?

Description : The micronutrient for bacteria; algae and fungi?

Last Answer : Cobalt

The primary producers of the deep-sea hydrothermal vent ecosystem are (a) green algae (b) chemosynthetic bacteria (c) blue-green algae (d) coral reefs.

Description : The primary producers of the deep-sea hydrothermal vent ecosystem are (a) green algae (b) chemosynthetic bacteria (c) blue-green algae (d) coral reefs.

Last Answer : (b) chemosynthetic bacteria

Which of the following is not correctly matched for the organism and its cell wall degrading enzyme? (a) Algae – Methylase (b) Fungi – Chitinase (c) Bacteria – Lysozyme (d) Plant cells – Cellulase

Description : Which of the following is not correctly matched for the organism and its cell wall degrading enzyme? (a) Algae – Methylase (b) Fungi – Chitinase (c) Bacteria – Lysozyme (d) Plant cells – Cellulase

Last Answer : (a) Algae – Methylase

What is VAM ? (A) Virus (B) Bacteria (C) Algae (D) Fung

Description : What is VAM ? (A) Virus (B) Bacteria (C) Algae (D) Fung

Last Answer : (D) Fungi

Carbohydrates, the most abundant biomolecule on earth, are produced by (a) some bacteria, algae and green plant cells (b) fungi, algae and green plant cells (c) all bacteria, fungi and algae (d) viruses, fungi and bacteria.

Description : Carbohydrates, the most abundant biomolecule on earth, are produced by (a) some bacteria, algae and green plant cells (b) fungi, algae and green plant cells (c) all bacteria, fungi and algae (d) viruses, fungi and bacteria.

Last Answer : (a) some bacteria, algae and green plant cells

Golgi apparatus is absent in (a) higher plants (b) yeast (c) bacteria and blue-green algae (d) none.

Description : Golgi apparatus is absent in (a) higher plants (b) yeast (c) bacteria and blue-green algae (d) none.

Last Answer : (c) bacteria and blue-green algae

Which one of the following statements is wrong? (a) Eubacteria are also called false bacteria. (b) Phycomycetes are also called algal fungi. (c) Cyanobacteria are also called blue-green algae. (d) Golden algae are also called desmids.

Description : Which one of the following statements is wrong? (a) Eubacteria are also called false bacteria. (b) Phycomycetes are also called algal fungi. (c) Cyanobacteria are also called blue-green algae. (d) Golden algae are also called desmids.

Last Answer : (a) Eubacteria are also called false bacteria.

Organisms, which fix atmospheric nitrogen in the soil, fall under the category of (a) bacteria (b) green algae (c) soil fungi (d) mosses.

Description : Organisms, which fix atmospheric nitrogen in the soil, fall under the category of (a) bacteria (b) green algae (c) soil fungi (d) mosses.

Last Answer : (a) bacteria

A few organisms are known to grow and multiply at temperatures of 100-105o C. They belong to (a) thermophilic sulphur bacteria (b) hot spring blue-green algae (c) methanogenic archaebacteria (d) marine archaebacteria.

Description : A few organisms are known to grow and multiply at temperatures of 100-105o C. They belong to (a) thermophilic sulphur bacteria (b) hot spring blue-green algae (c) methanogenic archaebacteria (d) marine archaebacteria.

Last Answer : (a) thermophilic sulphur bacteria

In the five kingdom system of classification, which single kingdom out of the following can include blue-green algae, nitrogen fixing bacteria and methanogenic archaebacteria? (a) Plantae (b) Protista (c) Monera (d) Fungi

Description : In the five kingdom system of classification, which single kingdom out of the following can include blue-green algae, nitrogen fixing bacteria and methanogenic archaebacteria? (a) Plantae (b) Protista (c) Monera (d) Fungi

Last Answer : (c) Monera