IIT JEE Practice Question and Answer
8Q: Which structure is not part of the Endomembrane System? 1979 05b5cc6a2e4d2b4197774cbd2
5b5cc6a2e4d2b4197774cbd2- 1Chloroplasttrue
- 2Plasma membranefalse
- 3Nuclear envelopefalse
- 4Golgi apparatusfalse
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Answer : 1. "Chloroplast"
Explanation :
Answer: A) Chloroplast Explanation: The endomembrane system is composed of the different membranes that are suspended in the cytoplasm within a eukaryotic cell. These membranes divide the cell into functional and structural compartments or organelles. In eukaryotes, the organelles of the endomembrane system include the nuclear membrane, the endoplasmic reticulum, the Golgi apparatus, lysosomes, vesicles, endosomes and the cell membrane, among others.
Q: In a mixture of three varities of oils , the ratio of their weight is 4 : 5 : 8. If 5 kg of oils of the first variety, 10 kg of the second variety and some quantity of oils of the third variety are added to the mixture, the ratio of the weights of three varieties of oils becomes as 5 : 7 : 9 in the final mixture, find the quantity of third variety of oil was ? 1979 05b5cc6cce4d2b4197774e177
5b5cc6cce4d2b4197774e177- 115 kgfalse
- 225 kgfalse
- 335 kgfalse
- 445 kgtrue
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Answer : 4. "45 kg"
Explanation :
Answer: D) 45 kg Explanation: Let the ratio of initial quantity of oils be 'x' => 4x, 5x & 8x.Let k be the quantity of third variety of oil in the final mixture.Let the ratio of initial quantity of oils be 'y'From given details,4x + 5 = 5y ..... (1)5x + 10 = 7y .....(2)8x + k = 9y ......(3) By solving (1) & (2), we getx = 5 & y = 5 From (3) => k = 5 Therefore, quantity of third variety of oil was 9y = 9(5) = 45kg.
Q: Which is the highest gallantry award in India? 1978 05b5cc64ae4d2b4197774bc25
5b5cc64ae4d2b4197774bc25- 1Param Vir Chakratrue
- 2Kirti Chakrafalse
- 3Vir Chakrafalse
- 4Param Vishishtat Seva Medalfalse
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Answer : 1. "Param Vir Chakra"
Explanation :
Answer: A) Param Vir Chakra Explanation: Param Vir Chakra (PVC) is India's highest military decoration awarded for the displaying distinguished acts of valor during the war. Ashok Chakra Award – An Indian military decoration awarded for valour, courageous action or self-sacrifice away from the battlefield. It is the peacetime equivalent of the Param Vir Chakra. Kirti Chakra – Second in order of precedence of peacetime gallantry awards. Maha Vir Chakra (MVC) is literally called a great warrior medal. Vir Chakra is an Indian gallantry award presented for acts of bravery in the wars.
Q: Which process allows water to enter the atmosphere? 1978 05b5cc699e4d2b4197774c6f1
5b5cc699e4d2b4197774c6f1- 1Transpirationfalse
- 2Respirationfalse
- 3Condensationfalse
- 4Evaporationtrue
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Answer : 4. "Evaporation"
Explanation :
Answer: D) Evaporation Explanation: Evaporation is the process that allows water to enter into the atmosphere. Sunlight turns liquid water into water vapor which then rises higher into the atmosphere and forms into clouds. Plants, too, help water get into the atmosphere through a process called transpiration.
Q: Which statement describes the term salary? 1978 05b5cc65ee4d2b4197774be64
5b5cc65ee4d2b4197774be64- 1Salary refers to the fixed amount paid on a daily basis.false
- 2Salary refers to the varying amount paid on a daily basis.false
- 3Salary refers to the fixed amount paid on a weekly, bi-weekly, or monthly basis.true
- 4None of the abovefalse
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Answer : 3. "Salary refers to the fixed amount paid on a weekly, bi-weekly, or monthly basis."
Explanation :
Answer: C) Salary refers to the fixed amount paid on a weekly, bi-weekly, or monthly basis. Explanation: A salary is best described as a fixed amount of income that is paid to an individual on a weekly, bi-weekly or monthly basis. A salary can also be described as the annual earnings paid out over a year.
Q: Which type of molecules polar or nonpolar dissolves in water? 1977 05b5cc696e4d2b4197774c550
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Answer :
Explanation :
In general, polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes.As water molecules are polar, polar molecules dissolves in water.
Q: A Step-Up Transformer Increases 1976 05b5cc6b5e4d2b4197774d54e
5b5cc6b5e4d2b4197774d54e- 1Powerfalse
- 2Currentfalse
- 3Frequencyfalse
- 4Voltagetrue
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Answer : 4. "Voltage"
Explanation :
Answer: D) Voltage Explanation: A transformer that increases voltage from primary to secondary (more secondary winding turns than primary winding turns) is called a Step-Up Transformer. Conversely, a transformer designed to do just the opposite is called a Step-Down Transformer.
Q: Which is a characteristic of a Mixture? 1976 05b5cc697e4d2b4197774c5b9
5b5cc697e4d2b4197774c5b9- 1a pure substancefalse
- 2chemically cominedfalse
- 3they can be mixed in some fixed ratiofalse
- 4it is either homogenous or heterogenoustrue
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Answer : 4. "it is either homogenous or heterogenous"
Explanation :
Answer: D) it is either homogenous or heterogenous Explanation: A mixture is the blending of two or more dissimilar substances. Characteristics of a Mixture: 1. It has No formula. 2. It is an impure sustance 3. They can be mixed in any ratio. 4. The properties of the mixture are the properties of its constituents. 5. Constituents can e easily seperated by physical methods.eg: Heating, Drying, Crystallization, Distillation etc... 6. It is either homogenous or heterogenous. A major characteristic of mixtures is that the materials do not chemically combine. Mixtures can be divided into those that are evenly distributed (homogeneous) and those that aren't (heterogeneous).

