General Science Class 9 MCQs MCQs - General Science Practice | PakExamPoint
Practise General Science Class 9 MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
General Science Class 9 MCQs MCQs and revision practice
Study General Science Class 9 MCQs through multiple-choice questions in General Science. This subtopic contains 366 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these General Science Class 9 MCQs MCQs to identify the facts, rules or methods you need to revise. Where an explanation is available, work through it and write down why your chosen option was correct or incorrect. Revisit difficult questions after reviewing your notes, then use exam mode for timed practice.
وہ رجحان جس میں ہومولوس کروموسوم کا جوڑا الگ ہونے میں ناکام ہو جاتا ہے جسے _____ کہا جاتا ہے؟
A. Synapsis
B. Linkage
C. Terminalization
D. Non-disjunction
Check answer and explanation
Answer: Non-disjunction
Explanation Non-disjunction is the phenomenon where a pair of homologous chromosomes (or a pair of sister chromatids) fails to separate properly during meiosis. Resulting in an abnormal number of chromosomes in the daughter cells. This can lead to genetic abnormalities , such as Down syndrome (trisomy 21), or other chromosomal disorders.
کھاد ایسے مادے ہیں جن میں کیمیائی عناصر ہوتے ہیں جیسے کھاد یا ______ کا مرکب؟
A. Nitrates
B. Proteins
C. Carbohydrates
D. Lipids
Check answer and explanation
Answer: Nitrates
Explanation Fertilizers are substances containing chemical elements that provide essential nutrients for plant growth, including: Nitrates (N) for leaf growth and development Phosphates (P) for root development, flower and fruit formation Potassium (K) for overall plant health and resistance to disease
Explanation Ethyl alcohol was prepared by Al-Razi ( also known as Rhazes ). He was a Persian polymath who made significant contributions to chemistry and medicine, including the distillation of alcohol.
Explanation NaCl is a classic example of an ionic compound Where sodium (Na) loses an electron to become a positively charged ion (cation), And chlorine (Cl) gains an electron to become a negatively charged ion (an anion). Formula: NaCl Molar mass: 58.44 g/mol IUPAC ID: Sodium chloride Melting point: 801 °C Soluble in: Water, Ammonia, Ethanol, Glycerol, Methanol, Propylene glycol, Formic acid, Formamide Classification: Salt Boiling point: 1,465 °C
جھلی کی ساخت کے سیال موزیک ماڈل کے بارے میں کون سا بیان درست ہے؟
A. Higher the temperature, less fluid nature
B. The less unsaturated the fatty acid, the more fluid nature
C. The more unsaturated the fatty acid, the more fluid nature
D. The lower the temperature, more fluid nature
Check answer and explanation
Answer: The more unsaturated the fatty acid, the more fluid nature
Explanation The correct statement about the fluid mosaic model of membrane structure is: The more unsaturated the fatty acid, the more fluid nature. Unsaturated fatty acids have kinks in their tails that prevent the lipids from packing tightly together, thus increasing membrane fluidity.
آئنک یا ہم آہنگی بانڈ سے انٹرمولیکولر قوتوں کی طاقت _______ ہے؟
A. None of above
B. Weaker
C. Equal
D. Stronger
Check answer and explanation
Answer: Weaker
Explanation Intermolecular forces are weaker than ionic or covalent bonds. Intermolecular forces are the attractive forces between molecules. While ionic and covalent bonds are the forces that hold atoms together within a molecule.
انزائم کی موجودگی ______ کی نوعیت یا خصوصیات کو متاثر نہیں کرتی ہے؟
A. Reactants
B. Activation energy
C. End products
D. Reaction rate
Check answer and explanation
Answer: End products
Explanation The presence of an enzyme does not affect the nature or properties of the end products of a chemical reaction. Enzymes only speed up the reaction , they do not change the final result. The end products are the same, regardless of whether an enzyme is present or not.
کیمسٹری کی وہ شاخ جو ہائیڈرو کاربان ______ سے متعلق ہے؟
A. Physical chemistry
B. Inorganic chemistry
C. Industrial chemistry
D. Organic chemistry
Check answer and explanation
Answer: Organic chemistry
Explanation Organic chemistry is the branch of chemistry that deals with hydrocarbons and their derivatives. They are compounds containing carbon and hydrogen atoms. It may also contain other elements like oxygen, nitrogen, and sulfur.
جانوروں کے خلیے میں مائٹوسس کے پروفیز کے دوران کون سا عمل ہوتا ہے؟
A. Separation of centrioles
B. Replication of DNA
C. Division of centromeres
D. Formation of chromosomes
Check answer and explanation
Answer: Separation of centrioles
Explanation During prophase of mitosis in an animal cell , separation of centrioles occurs. The centrioles move to opposite poles of the cell to help organize the mitotic spindle.
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