Mock Test-4 (Paper-1) (Question 51-100)

Total Questions: 50

31. Consider the following statements :

1. An alloy is a mixture of two or more metals.

2. An alloy is a mixture of a metal or metals with a non-metal.

Which of the statements given above is/are correct?

Correct Answer: (a) 1 only
Solution:a homogeneous mixture of two or more metals is known an Alloys.

32. Which one of the following polymeric materials is used for making bullet proof jacket?

Correct Answer: (c) Kevlar
Solution:Kevlar, a polymeric material is used for making bullet proof jacket.

33. In which of the following functional group isomerism is not possible?

Correct Answer: (c) Alkyl halides
Solution:Alkyl halides do not show functional isomerism. Alcohols and ethers; aldehydes and ketones; cyanides and isocyanides are functional isomers.

It is because there's only one way to attach a halogen to a carbon chain: via one single bond. Halogens can't form more than one bond in the context of common organic compounds, and can't form multiple bonds to carbon.

34. Which one of the following elements forms highest number oxf compounds?

Correct Answer: (d) Carbon
Solution:Carbon elements forms highest number of compounds.

35. Who was the discoverer of human blood groups?

Correct Answer: (a) Landsteiner
Solution:Kar! Landsteiner is credited for the discovery of human blood groups. He also won the 1930 Nobel Prize for Physiology or Medicine for the same.

Antonie Philips van Leeuwenhoek is commonly known as "Father of Microbiology", and often considered to be the first acknowledged microscopist and microbiologist. The terms Livine and Vinear doesn't exist.

36. Cellulose and starch both are made up of -

Correct Answer: (a) (+) - glucose
Solution:Cellulose consists of long polymer chains of glucose units connected by a beta acetal linkage. Starch consists of two types of molecules, amylose and amylopectin. Both amylose and amylopectin are polymers of glucose.

37. When sodium hydrogen carbonate powder is added to acetic acid, a gas evolves. Which one of the following statements is not true for this gas?

Correct Answer: (d) reacts with water to form sulphuric acid
Solution:When sodium hydrogen carbonate is added to acetic acid CO₂ gas is evolved.

CH₃COOH + NaHCO₃ → CH₃COONa + H₂O + CO₂

CO₂ reacts with water to form carbonic acid.

CO₂ + H₂O → H₂CO₃

38. An individual whose blood type is B may in an emergency, donate blood to a person whose blood type is

Correct Answer: (d) AB or B
Solution:As, AB is the universal recipient, B thus donate blood to these two groups of people (B and AB)

39. Collar cells occur in

Correct Answer: (a) sponges
Solution:Collar cells occurs in sponges and located at the anterior end of each choanocyte.

40. Which of the following is not a true statement about chloroplasts and mitochondria?

Correct Answer: (c) Both are membrane less organelles
Solution:Chloroplasts and mitochondria are considered to be the membrane bound endosymbionts in the eukaryotic cells. Both possess their own genetic material or genome. But most of their genes have been integrated into the nucleus. So, many proteins are transferred from the cytoplasm into the organelles.