ANSWER: [D] Explanation: The chemical reaction between dilute hydrochloric acid and granulated zinc is represented as: Zn + 2HCl → ZnCl₂ + H₂ ↑ The product zinc chloride, does not turn the reaction milky. Hydrogen gas evolved is colourless and odourless and released by the formation of bubbles. HencRead more
ANSWER: [D]
Explanation: The chemical reaction between dilute hydrochloric acid and granulated zinc is represented as:
Zn + 2HCl → ZnCl₂ + H₂ ↑
The product zinc chloride, does not turn the reaction milky. Hydrogen gas evolved is colourless and odourless and released by the formation of bubbles. Hence, your answer will be option [D].
ANSWER: [B] Explanation: As detergent are basic in nature, the concentration of Hydroxide ions will be high and concentration of hydronium Ions will be less. [Note: When bases are dissolved in water they dissociate into Hydroxide ions]
ANSWER: [B]
Explanation: As detergent are basic in nature, the concentration of Hydroxide ions will be high and concentration of hydronium Ions will be less.
[Note: When bases are dissolved in water they dissociate into Hydroxide ions]
ANSWER: [D] Explanation: During the preparation of hydrogen chloride gas, the gas is usually passed through the guard tube containing calcium chloride during humid climate, as calcium chloride is a good drying agent and absorbs moisture from the gas.
ANSWER: [D]
Explanation: During the preparation of hydrogen chloride gas, the gas is usually passed through the guard tube containing calcium chloride during humid climate, as calcium chloride is a good drying agent and absorbs moisture from the gas.
ANSWER: [B] Explanation: The given reaction is the reaction between Nitric Acid and Calcium Hydroxide to form Calcium Nitrate (a salt and water). The reaction between an acid and a base is known as “neutralization reaction”. It also involves formation of new compounds by the exchange of ions betweenRead more
ANSWER: [B]
Explanation: The given reaction is the reaction between Nitric Acid and Calcium Hydroxide to form Calcium Nitrate (a salt and water). The reaction between an acid and a base is known as “neutralization reaction”. It also involves formation of new compounds by the exchange of ions between reactants; it is also called “Double Displacement Reaction”.
ANSWER: [D] Explanation: Auxins are plant hormones that accumulate on the shaded side of the shoot when exposed to light. This higher concentration stimulates cells on the dark side to elongate more, causing the shoot to bend towards the light. This response is called phototropism. Cytokinins → promRead more
ANSWER: [D]
Explanation: Auxins are plant hormones that accumulate on the shaded side of the shoot when exposed to light. This higher concentration stimulates cells on the dark side to elongate more, causing the shoot to bend towards the light. This response is called phototropism.
Cytokinins → promote cell division.
Gibberellins → help in stem elongation and seed germination.
Adrenaline → an animal hormone, not a plant hormone.
Hence, the bending of shoots towards light is controlled by auxins.
Dilute hydrochloric acid is added to granulated zinc taken in a test tube. The following observation are recorded. Point out the correct observation:
ANSWER: [D] Explanation: The chemical reaction between dilute hydrochloric acid and granulated zinc is represented as: Zn + 2HCl → ZnCl₂ + H₂ ↑ The product zinc chloride, does not turn the reaction milky. Hydrogen gas evolved is colourless and odourless and released by the formation of bubbles. HencRead more
ANSWER: [D]
Explanation: The chemical reaction between dilute hydrochloric acid and granulated zinc is represented as:
Zn + 2HCl → ZnCl₂ + H₂ ↑
The product zinc chloride, does not turn the reaction milky. Hydrogen gas evolved is colourless and odourless and released by the formation of bubbles. Hence, your answer will be option [D].
See lessWhich of the following statement is correct for the water with detergent dissolved in it?
ANSWER: [B] Explanation: As detergent are basic in nature, the concentration of Hydroxide ions will be high and concentration of hydronium Ions will be less. [Note: When bases are dissolved in water they dissociate into Hydroxide ions]
ANSWER: [B]
Explanation: As detergent are basic in nature, the concentration of Hydroxide ions will be high and concentration of hydronium Ions will be less.
[Note: When bases are dissolved in water they dissociate into Hydroxide ions]
See lessTake about 1-gram solid NaCl in a clean and dry test tube and set up the apparatus as shown in figure. Now, say that – (If climate is humid the gas evolved is passed through a guard tube containing):
ANSWER: [D] Explanation: During the preparation of hydrogen chloride gas, the gas is usually passed through the guard tube containing calcium chloride during humid climate, as calcium chloride is a good drying agent and absorbs moisture from the gas.
ANSWER: [D]
Explanation: During the preparation of hydrogen chloride gas, the gas is usually passed through the guard tube containing calcium chloride during humid climate, as calcium chloride is a good drying agent and absorbs moisture from the gas.
See lessThe reaction 2HNO₃ + Ca(OH) ₂ → Ca(NO₃)₂ + 2H₂O is an example of:
ANSWER: [B] Explanation: The given reaction is the reaction between Nitric Acid and Calcium Hydroxide to form Calcium Nitrate (a salt and water). The reaction between an acid and a base is known as “neutralization reaction”. It also involves formation of new compounds by the exchange of ions betweenRead more
ANSWER: [B]
Explanation: The given reaction is the reaction between Nitric Acid and Calcium Hydroxide to form Calcium Nitrate (a salt and water). The reaction between an acid and a base is known as “neutralization reaction”. It also involves formation of new compounds by the exchange of ions between reactants; it is also called “Double Displacement Reaction”.
See lessThe plant hormone whose concentration stimulates the cells to grow longer on the side of the shoot which is away from light is:
ANSWER: [D] Explanation: Auxins are plant hormones that accumulate on the shaded side of the shoot when exposed to light. This higher concentration stimulates cells on the dark side to elongate more, causing the shoot to bend towards the light. This response is called phototropism. Cytokinins → promRead more
ANSWER: [D]
Explanation: Auxins are plant hormones that accumulate on the shaded side of the shoot when exposed to light. This higher concentration stimulates cells on the dark side to elongate more, causing the shoot to bend towards the light. This response is called phototropism.
Hence, the bending of shoots towards light is controlled by auxins.
See less