Pakexammcq, Author at Pak Exam MCQs

Which form of phosphorus is used in safety matches?

A. Yellow Phosphorus
B. Blue Phosphorus
C. Red Phosphorus
D. Purple Phosphorus

Answer & Solution

Option: C
Explanation :Pea sized portions of potassium chlorate and red phosphorus are reacted together by striking with a hammer. Smoke, a loud bang and a flash are observed.

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Which one is the lightest gas?

Pakexammcq Chemistry 0

A. Ammonia (NH3)
B. Nitrogen (N2)
C. Carbon Dioxide (CO2)
D. Hydrogen (H2)

Answer & Solution

Option: D
Explanation :Hydrogen and helium, the lightest two gases, weigh so little that helium balloons and hydrogen dirigibles are able to float in the atmosphere. Hydrogen is a diatomic gas, and helium is a monatomic gas. Both hydrogen and helium are lighter than air.

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Ozone is present in which of the following layers of atmosphere

Pakexammcq Chemistry 0

A. Troposphere and Thermosphere
B. Troposphere and Stratosphere
C. Mesosphere
D. Thermosphere

Answer & Solution

Option: B
Explanation :No explanation is available for this question. To view user comments or add your comments please Click Here..

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Which of the following contain Vitamin B7 (Biotin) or Vitamin H

Pakexammcq Biology, Vitamins 0

A. Egg Yolk
B. Meat
C. Yogurt
D. All of these

Answer & Solution

Option: D
Explanation :All B vitamins help the body to convert food (carbohydrates) into fuel (glucose), which is used to produce energy. These B vitamins, often referred to as B-complex vitamins. B-complex vitamins are needed for a healthy liver, and healthy skin, hair, and eyes. Biotin is a coenzyme involved in the metabolism.Food that contain richest sources of biotin are Liver and other Meats, Egg yolk, Yeast, Nuts and seeds (Almonds, Peanuts,Walnuts and pecans), Salmon (Salmon is a fatty fish), Dairy (Milk, Cheese, Yogurt),Avocados , Sweet Potato, Cauliflower.

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Which of the following contain Vitamin B6 (Pyridoxine)

Pakexammcq Biology, Vitamins 0

A. Vegetables
B. Meat
C. Tree Nuts
D. All of these

Answer & Solution

Option: D
Explanation :Vitamin B-6 (pyridoxine) is important for normal brain development and for keeping the nervous system and immune system healthy.All B vitamins help the body to convert food (carbohydrates) into fuel (glucose), which is used to produce energy. These B vitamins, often referred to as B-complex vitamins. B-complex vitamins are needed for a healthy liver, and healthy skin, hair, and eyes. It can be found in certain foods such as cereals, beans, vegetables, liver, meat, and eggs. It can also be made in a laboratory.

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Which of the following contain Vitamin B5 (Pantothentic acid)

Pakexammcq Biology, Vitamins 0

A. Broccoli
B. Fish
C. Legumes
D. All of these

Answer & Solution

Option: D
Explanation :Vitamin B5 is also known as pantothenic acid.All B vitamins help the body to convert food (carbohydrates) into fuel (glucose), which is used to produce energy. These B vitamins, often referred to as B-complex vitamins. B-complex vitamins are needed for a healthy liver, and healthy skin, hair, and eyes. It is found in Meat,Fish,Grains,Dairy products (Egg yolk, milk, yogurt, and milk products),Legumes(Lentils, split peas, and soybeans) and Vegetables (Mushrooms, avocado, broccoli, sweet potatoes, corn, cauliflower, kale, and tomatoes).

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Which of the following contain Vitamin B2 (Riboflavin)

Pakexammcq Biology, Vitamins 0

A. Mushrooms
B. Bananas
C. Beans
D. All of these

Answer & Solution

Option: D
Explanation :Vitamin B2, also known as riboflavin, All B vitamins help the body to convert food (carbohydrates) into fuel (glucose), which is used to produce energy. These B vitamins, often referred to as B-complex vitamins. B-complex vitamins are needed for a healthy liver, and healthy skin, hair, and eyes.Riboflavin is found in eggs, nuts, dairy products, meats, broccoli, brewer’s yeast, Brussel sprouts, wheat germ, wild rice, mushrooms, soybeans, green leafy vegetables and whole grain and enriched cereals and bread.

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Which of the following contain Vitamin B3 (Niacin)

Pakexammcq Biology, Vitamins 0

A. Fish
B. Meat, Eggs
C. Vegetables
D. All of these

Answer & Solution

Option: D
Explanation :Vitamin B3, also called niacin. All B vitamins help the body to convert food (carbohydrates) into fuel (glucose), which is used to produce energy. These B vitamins, often referred to as B-complex vitamins. B-complex vitamins are needed for a healthy liver, and healthy skin, hair, and eyes. Food sources of niacin include yeast, meat, fish, milk, eggs, nuts, green vegetables, beans and enriched breads and cereals. The human body can also make niacin from the amino acid tryptophan.

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Which of the following contain Vitamin B1 (Thiamine)

Pakexammcq Biology, Vitamins 0

A. Liver, Eggs
B. Cauliflower
C. Potatoes
D. All of these

Answer & Solution

Option: D
Explanation :Vitamin B1, thiamin, or thiamine, All B vitamins help the body to convert food (carbohydrates) into fuel (glucose), which is used to produce energy. These B vitamins, often referred to as B-complex vitamins. B-complex vitamins are needed for a healthy liver, and healthy skin, hair, and eyes. Fruit and vegetables that contain vitamin B1 are cauliflower, liver, oranges, eggs, potatoes, asparagus, and kale.Other sources include brewer’s yeast and blackstrap molasses.

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