General Science Questions (MCQs) for Competitive Examinations
General Science Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations. These questions are part of GKToday’s 35000+ MCQs Bank Course in GKToday Android App
1. A Gold Ring which is 50% pure. Its purity can be alternatively shown as __:
[A] 18 Carat
[B] 18 Karat
[C] 12 Carat
[D] 12 Karat
Show Answer
Correct Answer: D [ 12 Karat ]
Notes:
The carat is the common unit used to describe the mass of a gem. A 1-carat diamond, for example, has a mass of 0.20 g. The karat is the common unit used to describe the purity of a precious metal, such as gold. A 24-karat gold ring is as pure as can be. A gold ring that is 50 % pure is 12 karat.
2. What are the products of the reaction when metal carbonate reacts with an acid?
[A] Salt and Hydrogen
[B] Carbon dioxide
[C] Salt, Carbon dioxide and water
[D] Salt, Carbon dioxide and Hydrogen
Show Answer
Correct Answer: C [Salt, Carbon dioxide and water]
Notes:
All metal carbonates and hydrogen carbonates react with acids to give a corresponding salt, carbon dioxide and water. Limestone, chalk and marble are different forms of calcium carbonate.
3. What is the 4th state of matter?
[A] Bose-Einstein condensates
[B] Plasma
[C] Gas
[D] Liquid
Show Answer
Correct Answer: B [Plasma]
Notes:
Plasma is considered a distinct “fourth state of matter. A plasma is a hot ionized gas consisting of approximately equal numbers of positively charged ions and negatively charged electrons. The characteristics of plasmas are significantly different from those of ordinary neutral gases.
4. After whom is the chemical element with atomic number 102 named?
[A] Charles Darwin
[B] Albert Einstein
[C] Alfred Bernhard Nobel
[D] Isaac Newton
Show Answer
Correct Answer: C [Alfred Bernhard Nobel]
Notes:
Alfred Bernhard Nobel was a Swedish chemist, engineer, inventor, businessman, and philanthropist. Atomic number 102 was named after him.
5. Which of the following makes the skin layer impervious to water?
[A] Melanin
[B] Collagen
[C] Keratin
[D] Chitin
Show Answer
Correct Answer: C [Keratin]
Notes:
Keratin is a family of fibrous structural proteins involved in making up the outer layer of human skin. It is also the key structural component of hair and nails. Cells in the epidermis contain a structural matrix of keratin, which makes this outermost layer of the skin almost waterproof, and along with collagen and elastin, gives skin its strength. It also makes up fish scales and crustacean shells, bird feathers and beaks, animal horns and hooves.
6. Jhum cultivation refers to ____:
[A] Terrace farming
[B] Jamun cultivation
[C] Step farming
[D] Shifting agriculture
Show Answer
Correct Answer: D [Shifting agriculture
]
Notes:
Jhum is a traditional form of shifting cultivation that is common in the North-East of India. Also known as slash and burn agriculture, it is practiced by the tribal groups in Arunachal Pradesh, Meghalaya, Mizoram and Nagaland and the hilly areas of Assam. Jhum involves clearing a piece of land by setting fire or clear felling and using the area for growing crops.
7. _____ is the study of the microanatomy of cells, tissues and organs as seen through a microscope:
[A] Entomology
[B] Paleontology
[C] Histology
[D] Lchthyology
Show Answer
Correct Answer: C [Histology]
Notes:
Histology is the study of the micro anatomy of cells, tissues, and organs as seen through a microscope. It examines the correlation between structure and fun-ction.Histology is the micro-scopic counterpart to gross anatomy which looks at larger structures visible without a microscope.
8. The wing of a bat and the wing of a bird are the examples of ____ limbs:
[A] Heterogeneous
[B] Homogenous
[C] Homologous
[D] Analogous
Show Answer
Correct Answer: D [Analogous]
Notes:
The wings of insects, bats and birds, that evolved independently in each lineage separately after diverging from an ancestor without wings, are examples of analogous organs. Analogous organs are the opposite of homologous organs, which have similar functions but different origins.
9. Which of the following plant hormones are incorrectly paired?
[A] Cytokinins- senescence
[B] Abscisic acid- transpiration
[C] Auxins- apical dominance
[D] Gibberlins- bud and seed dormancy
Show Answer
Correct Answer: B [Abscisic acid- transpiration]
Notes:
Abscisic acid also called plant stress hormone is responsible for responsible for dormancy of various types. It maintains dormancy in seeds and buds, stimulates the closing of stomata. Gibberellins are responsible for cell division and growth in cell size.
10. An Antigen is ____:
[A] The result of Antibody
[B] The stimulus for Antibody formation
[C] The opposite of Antibody
[D] The residue of an Antibody
Show Answer
Correct Answer: B [The stimulus for Antibody formation]
Notes:
Antigens are defined as substances recognized by the body as foreign, causing the body to produce an antibody to react specifically with it. Antibodies are proteins produced by lymphocytes as a result of stimulation by an antigen which can then interact specifically with that particular antigen.
