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MCQOPTIONS
This section includes 2268 Mcqs, each offering curated multiple-choice questions to sharpen your Grade7 knowledge and support exam preparation. Choose a topic below to get started.
| 801. |
If the color, density, appearance and other physical and chemical properties are the same, solution is called |
| A. | heterogeneous |
| B. | homogenous |
| C. | saturated |
| D. | unsaturated |
| Answer» C. saturated | |
| 802. |
A scale which is used to measure hoe acidic or alkaline is called |
| A. | indicator |
| B. | pH scale |
| C. | pH meter |
| D. | balance scale |
| Answer» C. pH meter | |
| 803. |
The 'pH' of rain water is slightly |
| A. | acidic |
| B. | basic |
| C. | neutral |
| D. | alkali |
| Answer» B. basic | |
| 804. |
For removing paints and dyes 'caustic potash' is used. Its scientific name is |
| A. | potassium hydroxide |
| B. | sodium hydroxide |
| C. | magnesium carbonate |
| D. | magnesium hydroxide |
| Answer» B. sodium hydroxide | |
| 805. |
A ph scale ranges from zero to |
| A. | 10 |
| B. | 6 |
| C. | 11 |
| D. | 14 |
| Answer» E. | |
| 806. |
The beating of pulse is due to |
| A. | energy |
| B. | flow of blood |
| C. | flow of water |
| D. | oxygen |
| Answer» C. flow of water | |
| 807. |
The elasticity of red blood cells helps them to |
| A. | pass through capillaries easily |
| B. | absorb oxygen easily |
| C. | release carbon dioxide easily |
| D. | move in the veins easily |
| Answer» B. absorb oxygen easily | |
| 808. |
The artery that carries deoxygenated blood is |
| A. | renal artery |
| B. | hepatic artery |
| C. | mesenteric artery |
| D. | pulmonary artery |
| Answer» E. | |
| 809. |
The cells generally known "the army of human body" are |
| A. | white blood cells |
| B. | platelets |
| C. | red blood cells |
| D. | antigens |
| Answer» B. platelets | |
| 810. |
'Oxygen' is taken from |
| A. | cells to lungs |
| B. | heart to lungs |
| C. | lungs to cells |
| D. | cells to heart |
| Answer» D. cells to heart | |
| 811. |
The dissolved food is taken from |
| A. | liver to cells |
| B. | stomach to cells |
| C. | lungs to cells |
| D. | heart to cells |
| Answer» B. stomach to cells | |
| 812. |
In 1 mm3, the number of platelets is |
| A. | 100000 |
| B. | 150000 |
| C. | 200000 |
| D. | 250000 |
| Answer» E. | |
| 813. |
Deoxygenated blood is carried by |
| A. | arteries |
| B. | veins |
| C. | capillaries |
| D. | nerves |
| Answer» C. capillaries | |
| 814. |
The walls of veins are not thick as those of arteries because |
| A. | the blood is in less quantity |
| B. | the blood is deoxygenated |
| C. | the blood is low pressured |
| D. | the blood is thicker |
| Answer» D. the blood is thicker | |
| 815. |
The number of red blood cells that die every day is |
| A. | 100 thousand |
| B. | 200 thousands |
| C. | 100 million |
| D. | 200 million |
| Answer» E. | |
| 816. |
The walls of arteries are thick because of |
| A. | huge amount of blood |
| B. | pressure of blood |
| C. | gravity |
| D. | highly oxygenated blood |
| Answer» C. gravity | |
| 817. |
Carbon dioxide and other toxic waste is carried into blood by |
| A. | red blood cells |
| B. | white blood cells |
| C. | plasma |
| D. | platelets |
| Answer» D. platelets | |
| 818. |
In one complete round of circulation, blood comes to heart |
| A. | only once |
| B. | two times |
| C. | three times |
| D. | four times |
| Answer» C. three times | |
| 819. |
The function of the valves is to |
| A. | transfer the blood from atria to ventricles |
| B. | stop the backflow of blood |
| C. | help chambers to contract |
| D. | help chambers to relax |
| Answer» C. help chambers to contract | |
| 820. |
Converted glucose is stored in |
| A. | pancreas |
| B. | spleen |
| C. | liver |
| D. | gall bladder |
| Answer» D. gall bladder | |
| 821. |
Tubes in the body of a human or an animal in which red liquid flows, are generally called |
| A. | vessels |
| B. | veins |
| C. | arteries |
| D. | capillaries |
| Answer» B. veins | |
| 822. |
Dead red blood cells are broken up in |
| A. | stomach |
| B. | pancreas |
| C. | liver |
| D. | kidneys |
| Answer» D. kidneys | |
| 823. |
An adult human body contains approximately |
| A. | 3 liters of blood |
| B. | 4 liters of blood |
| C. | 5 liters of blood |
| D. | 6 liters of blood |
| Answer» D. 6 liters of blood | |
| 824. |
'Anemia' is caused due to lack of |
| A. | proteins in the blood |
| B. | carbohydrates in the blood |
| C. | iron in the blood |
| D. | fats in the blood |
| Answer» D. fats in the blood | |
| 825. |
The blood flows in the veins due to the |
| A. | squeezing action of muscles |
| B. | pumping of heart |
| C. | pumping of veins |
| D. | valves in the veins |
| Answer» B. pumping of heart | |
| 826. |
The shape of red blood cells is |
| A. | convex |
| B. | concave |
| C. | bi-concave |
| D. | bi-convex |
| Answer» D. bi-convex | |
| 827. |
The task of 'platelets' is to |
| A. | defend the body against disease |
| B. | transport oxygen |
| C. | heal the wounds |
| D. | refresh the heart |
| Answer» D. refresh the heart | |
| 828. |
Valves are present in |
| A. | veins only |
| B. | arteries only |
| C. | veins and arteries |
| D. | capillaries only |
| Answer» B. arteries only | |
| 829. |
When blood gets solid, it is called |
| A. | blood rock |
| B. | blood heal |
| C. | blood riff |
| D. | blood clot |
| Answer» E. | |
| 830. |
New red blood cells are formed in |
| A. | liver |
| B. | bone marrow |
| C. | spleen |
| D. | blood |
| Answer» C. spleen | |
| 831. |
The vessel that brings blood back to the heart from the lungs is known as |
| A. | renal artery |
| B. | pulmonary artery |
| C. | renal vein |
| D. | pulmonary vein |
| Answer» E. | |
| 832. |
Some types of white blood Cells also produce |
| A. | antigens |
| B. | antibodies |
| C. | useful bacteria |
| D. | useful viruses |
| Answer» C. useful bacteria | |
| 833. |
The blood in the right hand side of the heart is |
| A. | comes from veins |
| B. | from lungs |
| C. | comes from legs |
| D. | all of them |
| Answer» B. from lungs | |
| 834. |
The main blood protein present in it is called |
| A. | platelet |
| B. | fibrin |
| C. | fibrinogen |
| D. | bacteria |
| Answer» D. bacteria | |
| 835. |
The blood in left hand on the side of heart is |
| A. | impure |
| B. | deoxygenated |
| C. | pumped to the body |
| D. | from veins |
| Answer» D. from veins | |
| 836. |
What are the chemicals used in fireworks? |
| A. | copper chloride |
| B. | calcium chloride |
| C. | barium chloride |
| D. | all of above |
| Answer» E. | |
| 837. |
When liquids are heated, they |
| A. | expand more than gases but less than solids |
| B. | expand more than solids but less than gases |
| C. | do not expand |
| D. | none of above |
| Answer» C. do not expand | |
| 838. |
Ammonia is |
| A. | green in color |
| B. | blue in color |
| C. | colorless |
| D. | brown in color |
| Answer» D. brown in color | |
| 839. |
The color of solid magnesium is |
| A. | dark grey |
| B. | silver grey |
| C. | black |
| D. | whitish silver |
| Answer» C. black | |
| 840. |
Meaning of the word "anhydrous" is |
| A. | with water |
| B. | without water |
| C. | with copper |
| D. | without copper |
| Answer» C. with copper | |
| 841. |
As compare to low density polythene, the high density polythene is |
| A. | weak |
| B. | strong |
| C. | rough |
| D. | soft |
| Answer» C. rough | |
| 842. |
At the end of reaction, catalyst |
| A. | vanishes |
| B. | is used up |
| C. | remains unchanged |
| D. | resizes |
| Answer» D. resizes | |
| 843. |
The material which John Hyatt used for his artificial ivory, was |
| A. | complex |
| B. | chromatid |
| C. | celluloid |
| D. | diplex |
| Answer» D. diplex | |
| 844. |
In electric field, "PVC" is used to make |
| A. | pipes |
| B. | wire cover |
| C. | tungsten wire |
| D. | switches |
| Answer» B. wire cover | |
| 845. |
The least intermolecular forces are found in |
| A. | solids |
| B. | liquids |
| C. | gases |
| D. | fluids |
| Answer» D. fluids | |
| 846. |
No new substance is formed during |
| A. | photosynthesis |
| B. | respiration |
| C. | physical change |
| D. | chemical change |
| Answer» D. chemical change | |
| 847. |
Particles are close together in |
| A. | solids |
| B. | fluids |
| C. | liquids |
| D. | gases |
| Answer» B. fluids | |
| 848. |
'Photosynthesis' is a |
| A. | physical process |
| B. | chemical process |
| C. | biological process |
| D. | temporary process |
| Answer» C. biological process | |
| 849. |
The compound which is formed by heating iron and sulphur, is known as |
| A. | iron sulfate |
| B. | sulphur ironide |
| C. | iron sulfite |
| D. | iron sulfide |
| Answer» E. | |
| 850. |
Plastic was invented by |
| A. | British inventor |
| B. | French inventor |
| C. | American inventor |
| D. | Spanish inventor |
| Answer» D. Spanish inventor | |